Questions, Answered.

Red light therapy (photobiomodulation) uses specific wavelengths of red and near-infrared light to support how cells produce energy. The light is absorbed by mitochondria — the energy centres of the cell — which can support recovery, skin quality, sleep and overall vitality.

It is one of the most studied areas of light biology, with over 8,000 peer-reviewed studies, including research connected to NASA, Harvard Medical School and University College London. Results depend on using the right wavelengths, the right dose, and using it consistently.

Most devices use 2–6 wavelengths chosen for marketing numbers. Our REDelios ONE delivers 10 biologically relevant wavelengths from 297–1280nm with circadian modes — engineered around how nature signals to biology, not just LED output. Every product is built on 17+ years of clinical experience at ENDALA Clinic.

A single wavelength creates a signal; a spectrum creates context. Biology reads light through timing, dose, wavelength and environment together. Full-spectrum light more closely mirrors natural sunlight, which is the signal our cells evolved to understand.

Red light (around 630–660nm) is absorbed near the skin's surface and is linked to skin tone, collagen and visible quality. Near-infrared light (around 810–1070nm) is invisible and penetrates deeper to reach muscle, joints and even the brain. Most benefits come from using both together.

No. Tanning beds use UV light to darken skin and carry UV risk. Red light therapy uses red and near-infrared wavelengths with no tanning UV — it works with your cells' energy production, not melanin.

REDelios ONE (€1,580) is the full-body, full-spectrum system for sleep, recovery, energy and skin. redPINK (€308) is an LED face mask focused on skin. redZEN (€99) is a targeted lamp for specific areas. Blue-light-blocking glasses protect your evenings and focus your days.

redPINK is a facial LED mask with four wavelengths (405·630·660·810nm) designed for skin, used three minutes a day. REDelios ONE is a full-spectrum panel with ten wavelengths (297–1280nm) for whole-body biological effects across sleep, recovery, energy and skin.

Yellow glasses block around 85% of blue light for daytime screen use — sharper focus and calmer eyes. Red glasses block 100% of blue and green light for the evening, passing only therapeutic red, to protect melatonin and sleep.

REDelios ONE uses 10 wavelengths (297–1280nm). redPINK uses 4 (405·630·660·810nm). redZEN uses 6 (630·660·670·810·830·850nm).

Yes. REDelios ONE and redZEN are made for shared household use — each person can run their own session. redPINK is a personal facial device, so for hygiene it is best kept to one user.

Most people use light therapy daily or near-daily. REDelios ONE includes morning, midday and evening modes for different times of day. redPINK is a simple three-minute daily treatment.

Morning and daytime light supports alertness and circadian timing; evening light supports recovery and winding down. REDelios ONE's circadian modes are designed to match the light to the time of day.

Skin changes are often visible within a few weeks. Sleep, energy and recovery benefits build with consistent use. Light therapy works best as a steady daily habit rather than a one-off session.

Red and near-infrared light therapy is generally well tolerated. Follow the included protocols, avoid staring directly into bright LEDs, and consult a doctor first if you are pregnant, taking photosensitising medication, or managing a medical condition.

For bright full-spectrum panels like REDelios ONE, avoid looking straight into the LEDs and use comfortable eye protection during sessions. redPINK and redZEN follow their own included guidance.

More is not always better. Cells respond to an optimal dose, not the maximum. Follow the recommended session length and frequency in the included protocols rather than running longer or more frequent sessions.

For body and skin benefits, light works best directly on clean, bare skin. Clothing, heavy makeup and thick creams can block or scatter the wavelengths before they reach the tissue.

Shipping is free across Europe on orders over €150. Most orders ship within 1–2 business days.

We ship across Europe — including Czechia, Slovakia, Poland, Germany, Austria, Hungary, France and more. The United States is coming soon.

Yes. REDelios ONE comes with a 30-day home trial. If it isn't right for you, return it for a full refund.

We offer 30-day returns on eligible products. Contact support to start a return; refunds are issued once we receive the device back in good condition.

Every device carries a 2-year warranty, plus ongoing help with setup, protocols and servicing.

Checkout is secure and supports major payment methods. Instalment options may be available at checkout depending on your country.

Devices are supplied for European mains voltage. If you plan to use one elsewhere, contact us first about voltage compatibility and adapters.

Red and near-infrared light therapy is generally very well tolerated, with a strong safety record across thousands of studies. Use the included protocols, avoid staring into bright LEDs, and if you have a medical condition, check with a professional first.

If you are pregnant, please consult your doctor before starting any light therapy. We recommend professional guidance rather than self-prescribing during pregnancy.

Our devices are designed with adults in mind. For children, consult a healthcare professional first and always supervise any use.

Some medications increase sensitivity to light (photosensitivity). If you take any medication, especially photosensitising drugs, check with your doctor before using light therapy.

Our devices are designed to meet European safety standards for home use and ship with clear instructions and protocols. For specific medical conditions, consult a professional before use.

REDLIGHT.DOCTOR was born inside ENDALA Clinic, drawing on roughly 17 years of clinical experience and more than 30,000 clients helped. It is operated by ENDALA s.r.o., based in Prague, Czechia.

No. Our content is educational. Light therapy can support biology, but it is not a substitute for medical care. Always consult a qualified healthcare professional about any medical condition.

Email info@redlight.doctor, Monday to Friday, 9:00–17:00 CET. You can also use the form on our Contact page — we reply within one business day.

No. Red and near-infrared light cannot make vitamin D — your skin only produces it from UVB at around 297nm, a band ordinary red panels do not emit. This is the clearest proof that red light is not sunlight. A true full-spectrum device like REDelios ONE adds a measured 297nm UVB band precisely to close that gap.

Because UV is harder and costlier to do safely, so the industry skips it and ships roughly half of the sun's signal — the warm red/NIR back end only. We took the opposite path: if you want to copy the sun indoors, you cannot quietly delete the band that makes vitamin D and the UVA that mobilises nitric oxide.

Mostly, they don't. Above roughly 35°N — which is nearly all of Europe — the autumn-to-spring sun sits too low for enough UVB to reach the ground, so the skin makes little to no vitamin D outdoors for months. That winter UVB gap is exactly the problem a full-spectrum indoor sun is built to address.

Breadth of signal. A typical red light panel emits two to six wavelengths, all bunched above 600nm — the warm slice of the sun. A full-spectrum device like REDelios ONE spans 297–1280nm across ten wavelengths: UVB, UVA, violet, visible red and near-infrared together. One delivers a fragment of daylight; the other reproduces far more of the whole solar spectrum.

Yes, when used as designed: the UV is low-dose, time-limited and delivered through a guided protocol — never to tan or burn. Sunlight's UV is only harmful in excess; brief, well-timed exposure is how humans evolved to make vitamin D. The device meters UV the way a short morning sun does, not a midday beach.

UVB is ultraviolet light around 280–315nm — the highest-energy band that reaches the ground. Its signature job in the body is making vitamin D: UVB at roughly 297nm converts a cholesterol precursor in your skin into vitamin D3. It's also the band winter sun is too low to deliver and ordinary window glass filters out.

UVA is longer-wavelength ultraviolet around 315–400nm. Beyond tanning, research associates UVA with releasing nitric oxide stored in the skin, which relaxes blood vessels and is linked to lower blood pressure and better circulation. It penetrates deeper than UVB and is a real part of the daylight signal red-only panels skip entirely.

No. Ordinary glass blocks almost all UVB — the only band that makes vitamin D — while letting longer UVA and visible light through. So sitting in a sunny window, in a car, or in a conservatory feels warm and bright but produces essentially no vitamin D. This is another reason indoor life leaves the body UV-starved.

No — they're three different tools. A red light panel delivers red/NIR for skin and recovery; a SAD lamp delivers bright blue-white light for circadian timing and mood; a vitamin-D lamp emits UVB. Each touches one job. A full-spectrum device is the only format that addresses all three at once, because it carries all those bands.

Think complement, not replacement. Skin-made vitamin D from UVB is how the body evolved to get it, and a full-spectrum device can support that pathway in sunless months. But supplements remain a reliable backstop, especially through deep winter or for people who get little exposure. We position full-spectrum light alongside, not instead of, sensible supplementation.

Sunlight is a continuous spectrum — UV through visible through infrared — arriving together on a daily rhythm. A red/NIR panel reproduces one isolated stretch of that and goes silent on the rest. Full-spectrum light restores the breadth: the UV that makes vitamin D, the visible light that sets your clock, the near-infrared that reaches your cells. Breadth is what "copying the sun" means.

No — it's a supplement to daylight, not a substitute for it. Nothing fully replaces being outdoors. But most of us now live almost entirely indoors under depleted artificial light, and through a European winter the outdoor sun can't make vitamin D anyway. On those days, a measured dose of indoor sun gives your body signal it otherwise wouldn't get.

Because with UV, brief and well-timed beats long. The body makes vitamin D efficiently from a short, low-angle dose — then continued UV simply starts breaking vitamin D back down and raises skin risk. Our protocol keeps UV exposure short and morning-sun-like by design, so you get the signal without the overexposure.

It may support it. Bright, well-timed daytime light is associated with better mood and energy by anchoring the circadian clock — the basis of light therapy for the winter blues. A full-spectrum device delivers that bright daytime signal indoors during dark months. We frame this as circadian support for wellbeing, not a treatment for clinical depression.

Around 15–30cm for most full-body red/NIR sessions, but the exact distance depends on the device's measured irradiance. Closer isn't automatically better — it just delivers the dose faster, and overshooting the optimal dose can blunt the effect. Use the published irradiance at your distance, then let our dose calculator convert it into a session length.

A joule per square centimetre (J/cm²) is the light dose your skin receives — irradiance (power) multiplied by time. Most red/NIR studies land in a broad few-J/cm² to tens-of-J/cm² range depending on goal and depth. Rather than memorise numbers, enter your device and distance into our dose calculator and it does the maths.

mW/cm² is irradiance — how much light power lands on each square centimetre of skin. It's the number that actually determines your dose. Quoted at the LED surface it's meaningless marketing, because light spreads fast with distance. Always ask for irradiance measured at your real treatment distance (15–30cm); without it you can't calculate a dose.

Because photobiomodulation is biphasic: there's an optimal dose that stimulates cells, and going past it can stall or reverse the benefit. More power or longer sessions don't keep adding effect — they can subtract it. This "Goldilocks" curve is one of the best-established facts in the field, and it's why we built a dose calculator instead of saying "more is better."

Typically about 5–20 minutes per area for red/NIR, set by your device's irradiance and distance rather than a fixed clock. Consistency matters more than marathon sessions — a short daily dose compounds the way regular morning sun does, while one very long blast can simply overshoot the effective range.

Overdoing it is uncommon and usually mild — temporary skin redness, warmth or a light headache that clears within an hour. Because the dose response is biphasic, "too much" tends to waste the benefit rather than cause harm. Start with shorter sessions, build gradually, and follow the calculator rather than chasing intensity.

It varies by goal and builds over time. Skin tends to show first — a glow in about two weeks, with firmness and fine-line changes over roughly 8–12 weeks of consistent use. Recovery, energy and sleep benefits accumulate rather than arrive overnight. As with sunlight, the effect comes from a regular dose, not a single session.

Bare skin is best. Light has to reach the skin to do anything, and clothing — especially dark or thick fabric — absorbs and scatters much of it before it gets there. Expose the area you're treating, keep eyewear on, and you'll get far more of the dose the device actually delivers.

Before, on clean, dry, bare skin. A shower removes oils, sweat, makeup and product residue that can sit between the light and your skin, and dry skin avoids any water film scattering the light. Cleanse, dry off, do your session, then apply skincare afterwards.

No — cleanse first. Makeup, sunscreen and heavy creams can block or scatter light at the skin surface, and sunscreen is specifically designed to absorb part of the spectrum. Go in with clean, bare skin so the dose reaches you, then apply serums or moisturiser after the session.

Over fully healed skin, generally yes. The caution is that dark tattoo ink absorbs more light and can warm up, so over large or very dark tattoos keep sessions shorter and watch for heat. Never use it on fresh or healing tattoos. If in doubt, treat around the area or ask your artist.

Either, depending on your goal — and full-spectrum timing matters more than for red-only. Bright daytime light supports alertness and sets your clock; gentle, warm evening light suits wind-down. Pure red/NIR sits far from the alerting blue band, so it's flexible. REDelios ONE offers distinct circadian modes precisely so the light matches the time of day.

Yes — daily use is fine and, for most goals, ideal, as long as you stay within the optimal dose for each area. Benefits build with consistency, much like a daily dose of morning sun. Just don't assume that doubling up sessions doubles results; the biphasic curve says otherwise.

Both. Benefits accumulate with consistent use over weeks, but they're maintained rather than banked — like fitness or sun exposure, the signal fades if you stop. Think of it as an ongoing habit that keeps a baseline, not a course you complete once. Steady, regular use beats occasional intensive bursts.

Panels and lamps like REDelios ONE and redZEN, yes — they're shared by nature, just give each person their own session and eyewear. An LED face mask like redPINK sits against the skin, so for hygiene it's best treated as personal. Wavelengths and dosing don't change between users.

Keep it simple: clean, dry, bare skin and your eye protection on. Remove makeup, sunscreen and heavy product so nothing blocks the light, dry off any water, and treat the bare area directly. Apply your serums and moisturiser afterwards, when skin is primed.

Most healthy adults can use it, but check with a professional first if you're pregnant, have active cancer in the treatment area, take photosensitising medication, have photosensitive epilepsy, or manage a thyroid or autoimmune condition. This isn't a warning that it's dangerous — it's that these situations need individual judgement we can't give online.

Side effects are uncommon and mild. The most reported are temporary skin redness, warmth, mild eye strain if you skip eyewear, or an occasional light headache — typically clearing within an hour. It's a non-ionising, low-risk modality. Starting with shorter sessions and using eye protection keeps even these minor effects rare.

Red and near-infrared light is gentle to the eyes — unlike blue light, it carries low photochemical retinal hazard, and research even studies red wavelengths for retinal health. Still, bright LEDs are uncomfortable to stare into, so wear the supplied eyewear and don't look directly at the array. For any device with UV, eye protection is essential.

Red and near-infrared light is non-ionising and is not associated with the DNA damage that drives skin cancer — fundamentally different from tanning-bed UV. In a true full-spectrum device, the only UV present is kept low-dose and time-limited by protocol, far from burning or tanning levels. Used as directed, the safety profile is reassuring.

Be cautious and ask your doctor first. As a sensible default, avoid direct treatment over the front of the neck if you have a thyroid condition, and use red light elsewhere on the body. There's no evidence it's harmful, but the thyroid is a sensitive area and individual guidance beats a blanket answer.

Confirm with your doctor or pharmacist before starting. Some medications — certain antibiotics, retinoids, diuretics, St John's Wort and others — increase the skin's sensitivity to light and could make a reaction more likely. This is the single most important contraindication to check, because it depends entirely on your specific medication, not on the device.

There's no specific evidence of harm from red/NIR light in pregnancy, but it hasn't been well studied either, so we don't recommend self-prescribing. Speak with your midwife or doctor first, and as a precaution avoid direct treatment over the abdomen. Professional guidance, not a generic green light, is the right approach here.

Our devices are designed for adults. Children's skin and eyes are more sensitive, and dosing isn't established for them, so any use with a child should be supervised and cleared with a paediatric professional first. We don't position these products for children's use, and eyewear is non-negotiable if a professional does advise it.

There's no known mechanism by which red or near-infrared light would interfere with a pacemaker or implant — light is non-ionising and doesn't generate the electromagnetic interference these devices guard against. Even so, if you have any implanted device, we'd still suggest a quick check with your cardiologist before starting, for peace of mind.

Follow your practitioner's guidance — they know your skin's state. In general, wait until the skin has settled, then start gentle and short. Red light is studied to support skin repair, which is why some clinics use it post-procedure, but timing after peels, injectables or laser work should be set by the professional who did it.

Yes, with simple sequencing: do your light session on clean, bare skin first, then apply retinoids or exfoliating acids afterwards. Light reaches the skin best without product in the way, and your actives absorb better onto freshly treated skin. If your skin is irritated from strong actives, ease off and go gentle.

Red light does not meaningfully suppress melatonin. Melatonin suppression peaks in the blue band around 460–464nm and falls away sharply toward red, so warm red/NIR light sits far from the wavelengths that signal "daytime" to your brain. That's why red is the friendliest light for the evening — and why we make deep-red eyewear for night.

For evening sleep timing, yes — blocking blue and green light at night protects the wind-down the sun used to give you, because that's the band that suppresses melatonin. For daytime eye strain the evidence is weaker. The honest rule that follows: yellow by day, red at night.

Lens colour decides what's blocked, which decides when to wear them. Yellow/amber lenses cut most of the blue band — good for daytime screen comfort and early evening. Deep-red lenses cut blue and green, the fullest evening wind-down. Same daily rhythm, two ends: yellow by day, red at night.

Wear yellow/amber during the day for screen comfort, or in the early evening if your screens are dim. Switch to deep red roughly 2–3 hours before bed, when protecting melatonin matters most. Think of red glasses as the evening counterpart to getting bright light in the morning.

Because the melatonin-relevant signal extends past blue into green, and only the deeper red lens removes green too — so it protects the dark half of your day most completely. Amber is enough for daytime comfort; deep red is the choice for the last hours before sleep.

No. Deep-red lenses give a strong red cast and distort colour, so they're for the last hours at home before bed — not for driving or any task where colour or contrast matters. Yellow/amber lenses are far lighter and fine for daytime indoor wear.

Daytime amber lenses may feel more comfortable for some people, but comfort isn't a proven medical effect, and much screen strain comes from blink rate, distance and breaks rather than blue light itself. The clearest evidence is for evening sleep timing. Use the 20-20-20 habit for strain first.

The glasses are standalone frames. If you wear prescription lenses, choose our clip-ons instead — they attach over your existing Rx glasses and deliver the same yellow-day or red-night spectral blocking. Both glasses and clip-ons are €31, in yellow and deep red.

Software night-modes help but are incomplete — they shift the screen, not the room, and don't cover ceiling lights, lamps or other devices. Glasses block short-wavelength light right at the eye, whatever the source. Use night mode and warm dim rooms as well; the glasses close the gap.

Worn in the last hours before bed, blue-blocking eyewear can support healthy sleep timing for older children and teens, the same way it does for adults. Supervise use, keep daytime light bright, and treat it as a sleep-hygiene aid, not a fix for a sleep disorder.

Get bright light early — ideally daylight outdoors soon after waking — to set your body clock for the day, then keep evenings dim and warm. Timed bright light is what strongly resets the human clock, which is why morning brightness and evening darkness work as a pair.

Indirectly, yes. Red light sits far from the blue band that suppresses melatonin, so a dim, warm, red-lit evening doesn't fight your wind-down the way blue-heavy lighting does. It supports a calm pre-sleep environment — it's not a sedative, and good light timing across the whole day matters most.

Bright morning light sets your internal clock, which schedules when melatonin is released that evening — so a well-anchored morning is what lets sleep arrive on time at night. Light timing entrains the master clock; the morning and the night are two ends of one rhythm.

It's your body's roughly 24-hour internal clock, set mainly by light. Bright light in the morning tells it "day," darkness at night tells it "night," and that timing governs sleep, alertness, hormones and metabolism. Modern indoor life blurs the signal — too dim by day, too bright at night.

Aim for meaningful bright light early in the day — outdoors beats indoors, because even a bright room is far dimmer than daylight. There's no single number, but consistent morning light anchors your clock best. Through dark winters, indoor full-spectrum light helps fill the gap daylight leaves.

It can. Blue-rich screen and ceiling light in the last hours delays melatonin and pushes your clock later, because that short-wavelength band is exactly what signals "daytime." Dim and warm your lights, use night modes, and block blue/green at the eye with deep-red glasses before bed.

The most-studied skin bands are red around 630–660nm and near-infrared around 810nm, which support fibroblast activity and collagen. Our redPINK mask combines 405·630·660·810nm for exactly this. A controlled trial of red/NIR light found increased collagen density and reduced fine lines.

It may support clearer-looking skin — violet ~405nm excites bacterial porphyrins and red light calms the local environment — but we're honest: a Cochrane review found high-quality acne evidence is lacking and benefits uncertain. We say "supports clarity," not "treats acne." redPINK includes a 405nm band.

It's associated with gradual improvement in firmness and fine lines over weeks to months, not overnight. Red 660nm light has been shown to raise type-I procollagen and lower the collagen-degrading enzyme MMP-1, with clinically reduced wrinkles in controlled study — a slow, compounding effect, like daily sun.

Red and near-infrared light carry no UV and no heat reliance, so they're generally well tolerated, but everyone's skin differs. Start gentle — shorter sessions, more distance — and see how your skin responds. If you have an active skin condition or take photosensitising medication, check with a professional first.

They do different jobs. Red and near-infrared support firmness, tone and a calmer skin environment at depth; violet/blue (~405nm) acts at the surface on clarity by exciting bacterial porphyrins. They're complementary, which is why redPINK combines violet with red and near-infrared rather than choosing one.

Red/NIR light supports the skin-repair environment — fibroblast activity and collagen remodelling — so it may help the look of some scars over time, but results vary a lot by scar type and age. We frame this as support, not removal, and recommend patient, consistent use.

Use the mask on clean, bare, dry skin so the most light reaches it — no makeup or heavy serums in the way. Cleanse first, do your light session, then apply serums and moisturiser afterwards. Avoid layering photosensitising actives right before light; save acids and retinoids for after.

Expect a glow and better texture in roughly two weeks of consistent use, with firmness building over about 8–12 weeks as collagen responds. Skin works on a slow clock, so daily-ish consistency beats occasional long sessions — the same way a steady dose of sun compounds.

It's moderately supported. Near-infrared light reaches muscle and is absorbed by mitochondria, and red/NIR is associated with improved muscle performance, delayed fatigue and better repair after exercise. Effects are real but modest — a recovery aid that supports the conditions for recovery, not a substitute for training and rest.

Near-infrared light penetrates deeper than red, so it can reach joints and support comfort and mobility. A Lancet meta-analysis found low-level laser therapy reduced acute and chronic neck pain versus placebo — one of the field's strongest results — though we describe support, not a cure.

Both are reasonable. Many people use light before training to prime the muscle and after to support recovery — the research covers performance and repair around exercise. Pick what fits your routine; consistency matters more than perfect timing. Use the dose calculator to stay in the effective range.

Roughly 8–15 minutes per area is a common starting range, but the right dose depends on the device's irradiance and your distance — and more isn't better, because the response is biphasic. Our dose calculator turns those inputs into an actual time so you're in the effective window.

Plausibly, modestly. Red/NIR light supports mitochondrial ATP production, the cell's energy currency, which is associated with steadier daytime energy for some people. But "energy" is also a circadian story — bright light by day, darkness at night. A red panel supports one part; it doesn't replace daylight timing.

This is emerging, not established. Around 810nm penetrates deepest and is the most-studied transcranial wavelength, with early signals for cognition — but the largest trial (in stroke) was stopped for futility, so we keep expectations honest. Interesting and supportive at best, not a proven cognitive treatment.

Specific red wavelengths have real evidence: a randomised trial found a 655nm device increased hair count about 39% versus sham in androgenetic alopecia. It depends on ongoing, consistent use, and results vary. We're transparent — we don't sell a dedicated hair device, so judge it on that evidence, not our marketing.

Honestly, the evidence here is weak, and we don't position any product for fat loss. There's early mechanistic work on light, mitochondria and glucose metabolism, but that's a lab signal, not proof a panel slims you down. Be sceptical of any device sold as a fat-loss shortcut, including ours.

It's associated with a calmer local environment. Photobiomodulation can lower reactive-oxygen stress in already-stressed cells and modulate inflammatory signalling, which supports comfort — but it's a supportive input, not an anti-inflammatory drug, and effects are dose-dependent. We describe support and association, never treatment of an inflammatory disease.

Red/NIR light supports collagen and firmness over time, so some people see a smoother, firmer look — but we're cautious here, because body-contouring and cellulite claims are routinely overstated across the industry. Expect gradual firmness support, not contouring or fat removal, and give it months, not days.

Timed bright daytime light supports mood and energy through your circadian system — that's well grounded, and it's the principle behind morning light and full-spectrum indoor light in dark winters. A narrow red-only panel isn't the tool for this; breadth and timing of daytime light are what matter.

Strategic light timing is the main lever for shift workers — bright light during the working night to stay alert, then blocking blue/green light and keeping things dim before daytime sleep to protect melatonin. It's about anchoring an out-of-phase rhythm; deep-red glasses help guard the "night" you've shifted.

Start with form-for-goal — face (mask), targeted aches (lamp), whole-body or indoor-sun (panel) — then judge the specs that matter: real irradiance at your treatment distance, exact wavelengths, low flicker and EMF, and an honest warranty. Our buying guide walks through each in order.

Be cautious. Many inflate "surface" or total LED wattage — numbers that say little about the light reaching your skin. Demand irradiance in mW/cm² measured at a real treatment distance (15–30cm). Without that figure you can't calculate dose, and the response is biphasic, so guessing wastes the effect.

Red flags: no irradiance stated at a real distance, only big watt numbers, vague "red + infrared" instead of exact nanometres, no flicker or EMF figures, and "full-spectrum" claimed for two red diodes. Transparency is the proxy for quality — good makers publish specs; hype hides them.

It's a different category, stated plainly as the maker: most panels deliver two-to-six red/NIR wavelengths, while REDelios ONE (€1,580) spans 297–1280nm across 10 wavelengths including UV — built to reproduce the indoor light environment, not just red/NIR. If you only want red/NIR, a focused panel may suit you fine.

Joovv makes large, modular red/NIR panels — well-built, but red and near-infrared only. REDelios ONE takes a different brief: breadth of signal, 297–1280nm including UV across 10 wavelengths, to reproduce more of the whole daily light environment. Modular red-only vs full-spectrum indoor sun — choose by goal.

Mito Red, like most of the market, competes on red/NIR wavelength count and irradiance. REDelios ONE competes on spectral breadth — spanning UV through visible to near-infrared (297–1280nm) — because our argument is that biology reads the whole signal, not more diodes in one warm band.

Match it to your goal. A mask like redPINK (€308) is hands-free and shaped for the face; a panel covers the whole body and, in REDelios ONE's case, adds the UV and circadian bands red-only panels skip. Many people own both — face mask plus whole-body panel.

For pure red/NIR goals, a couple of well-dosed bands can be enough. But biology reads a coordinated signal across the spectrum, so more — and broader — wavelengths make a device more versatile, especially if you want the UV and circadian parts of sunlight, not just the warm end.

Pick by coverage need: a screw-in lamp (redZEN, €99) for a small targeted area, a mask (redPINK, €308) for the face, or a full panel (REDelios ONE, €1,580) for whole-body and indoor-sun use. Bigger isn't automatically better — match the area you'll treat.

For most people, home wins — because benefits build with consistency, and a device you use daily beats a better one you visit occasionally. Clinics suit supervised or one-off needs. A one-time home purchase also avoids the recurring per-session cost that adds up fast over a year.

No. Past the point where a device publishes honest specs — irradiance at distance, exact wavelengths, low flicker and EMF — extra cost should buy real things: more of the spectrum, better build, longer warranty, support. Price without transparent specs is just a bigger number, not a better light.

For something you sit close to, daily, for minutes at a time, yes — they're worth checking. Low, well-managed EMF at treatment distance and low light flicker make for more comfortable regular use. Quality manufacturers publish both figures; vague ones stay quiet, which tells you something.

Flicker is rapid, often invisible pulsing in the light output, driven by the power circuitry. For sensitive people it's associated with eye strain and headaches during close, regular use, so look for a low flicker figure (commonly under 1%). It's a build-quality marker worth asking about.

A well-built panel runs cool-to-warm, not hot — good thermal design keeps the LEDs efficient and the surface comfortable at your treatment distance. A panel that runs hot is usually a sign of weaker engineering or overdriven diodes, and heat isn't the point; the light is.

Pulsed mode delivers the light in rhythmic bursts rather than continuously. Some lab studies suggest specific pulse rates can behave differently from continuous light, but the evidence is early and not settled. REDelios ONE includes programmable pulse for those who want it — useful to have, not essential for results.

Look for the appropriate regional electrical-safety marks for your market, a real warranty, and — ideally — published third-party measurements of irradiance, wavelengths, flicker and EMF. Certifications confirm basic safety; transparent, verifiable spec data is what actually tells you the light performs as claimed.

For home use, LED is the right tool: broad, safe, even coverage over large areas, and the basis of most modern light-therapy research. Lasers are coherent, point-focused and belong in clinical settings. So a home LED panel isn't a downgrade — it's the correct technology for daily whole-body use.

Yes. REDelios ONE comes with a 30-day home trial — use it properly for a month, and if it's not right for you, return it for a full refund including return shipping. We'd rather you build the daily habit and feel the difference than keep a device that sits unused.

REDelios ONE includes a 2-year warranty, plus help with setup, protocols and servicing — we treat it as a device we stand behind, not a gadget. A real warranty also signals a maker who expects the device to last, which is exactly what you should demand of any panel.

We currently ship across the EU — including Czechia, Slovakia, Poland, Germany, Austria, Hungary, France and more — with other markets opening over time. A US launch is planned. If you're unsure about your country, email us at info@redlight.doctor and we'll confirm before you order.

Orders typically ship within 1–2 business days, with delivery times depending on your country. EU shipping is free over €150; smaller orders carry a standard rate shown at checkout. If you need a delivery estimate for your address, contact us and we'll give you a realistic window.

Often, yes — instalment and pay-later options appear at checkout depending on your country and the available providers there. The exact choices vary by market, so the simplest way to see what applies to you is to add the item and check the payment options at checkout.

REDelios ONE is built for EU mains voltage. If you're outside the EU or unsure whether it suits your electrical supply, contact us at info@redlight.doctor before ordering — we'll tell you honestly whether it's compatible rather than risk you receiving a device that won't run safely.

There's no app to install. REDelios ONE is controlled directly on the device via its built-in display, plus an included remote — you set the spectrum, mode and timing without a phone. We kept it self-contained on purpose: a light device you operate directly, not another account to manage.

Yes — in-stock items ship within 1–2 business days. If anything is temporarily on backorder, the product page and checkout will show it, and we'll give you an honest restock date rather than take an order we can't fulfil promptly. When in doubt, ask us.

REDelios ONE ships ready to use: the device, its remote, the on-device controls, protective eyewear, and a protocol guide to get you started safely. The eyewear matters because you shouldn't stare into bright LEDs — wear it during sessions and follow the included guidance on distance and time.

REDLIGHT.DOCTOR is built on ENDALA Clinic — roughly 17 years of practice and 30,000+ clients — and operated by ENDALA s.r.o. in Prague. We're a clinic-and-research-grounded team putting that experience into honest, full-spectrum light tools, with a named team and credentials on our team page.

We're educational and wellness-focused, grounded in clinical practice and research — not a substitute for medical care. We describe what the science supports and what it doesn't, and we say "supports" and "associated with," never "cures." For diagnosis or treatment, see a qualified professional; for honest light science, see us.

Yes — photobiomodulation is among the most-studied areas in light science, and we publish our sources openly. Our research library holds 150 cited studies, each graded by strength, including the honest negatives. We'd rather show you the graded evidence than a highlight reel, because calibrated honesty is the trustworthy position.

Because we publish them and stand behind them: exact wavelengths and spectrum (297–1280nm for REDelios ONE), plus a 30-day trial and 2-year warranty so you can verify the experience risk-free. Transparency and a real return policy are how a maker earns trust — claims you can check, not just assert.

Yes — email info@redlight.doctor, Monday to Friday, 9–17 CET, and we'll help you choose honestly, including telling you if a cheaper device or no device fits your goal better. We'd rather you buy the right thing once than the wrong thing twice.

Red light therapy, or photobiomodulation, is the use of specific red and near-infrared wavelengths (roughly 630–850nm) to support the body. The light is absorbed by cytochrome c oxidase in your mitochondria, supporting cellular energy (ATP) production. It's well-studied for skin, wound healing and recovery — and it's one real band of the sun's much wider spectrum.

Photobiomodulation (PBM) is the scientific term for what's popularly called red light therapy: using non-thermal red and near-infrared light to influence cell function rather than to heat or cut tissue. It replaced the older term "low-level laser therapy" because the effect comes from the light's wavelength and dose, not from a laser specifically.

Wavelength and depth. Red light (~630–660nm) is visible and works mainly at the surface — skin and just beneath. Near-infrared (~810–1070nm) is invisible and penetrates deeper, reaching muscle, joints and tissue below. Both are absorbed by the same mitochondrial target; you simply choose red for skin and NIR for what lies underneath.

No. A tanning bed uses UV to darken skin; red light therapy uses non-UV red/NIR and doesn't tan. An infrared sauna uses far-infrared heat to warm you and make you sweat; red light therapy is non-thermal and works through wavelength, not heat. They're three different tools with three different mechanisms — easy to confuse, easy to keep straight.

Through specific light-absorbing molecules. Red and near-infrared light is absorbed by cytochrome c oxidase, an enzyme in the mitochondria; this is thought to release inhibitory nitric oxide and briefly boost electron transport, supporting ATP energy production. Other wavelengths have their own targets — UVB makes vitamin D, blue sets the clock — which is the whole case for full spectrum.

Very much so. With light, four things decide the effect: wavelength (which band), dose (how much energy reaches the tissue), timing (when in your day), and consistency (how regularly). Photobiomodulation is biphasic — too little does nothing, too much can stall the benefit. Getting all four right is exactly what separates a real result from a gadget gathering dust.