Red Light Therapy Wavelengths: What Commercial Buyers Should Actually Check

Intro

Two machines can both be called a "red light therapy bed," both be full-body, both look similar in a photo, and cost $16,000 and $96,000 respectively. The price gap is not margin. They emit different light.

This is the single most confusing part of buying commercial equipment in this category, and most vendor material makes it worse, because a vendor who sells one class has no reason to explain the other.

This guide lays out the actual difference, shows which specs you can independently verify and which you cannot, and gives you three questions that separate real machines from marketing.

We sell full-spectrum equipment, so we have an interest here. We have tried to handle that by sticking to published figures with sources, naming the specs where our own numbers are as unverifiable as anyone else's, and telling you which claims in this industry do not hold up. Check the sources at the bottom.

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Key Facts

• Visible red light runs roughly 620 to 700nm. Near-infrared runs roughly 700 to 1100nm, with the commonly used therapeutic wavelengths at 810, 830, 850 and 940nm.
• Beauty-class beds emit visible red only. Full-spectrum systems emit red plus near-infrared.
• The Ergoline Beauty Angel, used in Planet Fitness Total Body Enhancement booths, was independently measured with a 620nm primary peak and no near-infrared output in the 810 to 850nm range.
• Beauty-class beds cost roughly $15,000 to $20,000. Full-spectrum systems run $60,000 to $100,000.
• No vendor publishes the measurement distance or method behind its irradiance figure. Treat every mW/cm² number as unaudited, including ours.
• Published photobiomodulation research uses irradiances of roughly 0.1 to 25 mW/cm² for tissue regeneration and up to 150 mW/cm² for pain and inflammation work.
• WALT dosage guidance caps recommended irradiance at 100 mW/cm².
• FDA cleared, approved, and registered mean three different things. A 510(k) clearance belongs to the manufacturer that obtained it, covers one stated intended use, and does not transfer to the operator.
• FDA product codes for these devices: NHN for adjunctive pain-therapy use, ONF for aesthetic use. Many beds hold neither and are sold as general wellness products.
• The Lux S10 Pro is vendor-stated at 129 mW/cm², above WALT's recommended 100 mW/cm² ceiling and below TheraLight's claimed 165. Like every figure in this category, it is not measured to a common standard.
• There is no trade association or standards body that formally classifies red light beds into tiers.

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What is the difference between red light and near-infrared?

Wavelength, and therefore what the light does when it hits a body. Visible red sits around 620 to 700nm and is absorbed at and near the skin surface. Near-infrared sits above 700nm, with 810, 830 and 850nm the wavelengths most used in photobiomodulation research, and penetrates further because tissue scatters and absorbs it differently.

The reason near-infrared goes deeper has a name. Between roughly 650 and 1350nm there is a region called the near-infrared window in biological tissue, where hemoglobin absorption drops off at the short end and water absorption has not yet risen at the long end. Inside that window, light travels further through tissue than it does outside it.

Here is where we are going to be more careful than most vendors.

You have probably seen a chart claiming red penetrates "1mm" and near-infrared penetrates "2mm," or similar tidy pairs. We went looking for the peer-reviewed source of those numbers and could not find one. The figures circulate on vendor blogs citing other vendor blogs.

What the literature actually supports:

• The near-infrared window spans roughly 650 to 1350nm, with scattering the dominant limiting factor (Smith, Mancini & Nie, Nature Nanotechnology, 2009; Wang & Wu, Biomedical Optics, 2007).
• In tissue phantom work, 660nm transmitted 30.7% through 1cm of beef and 68.1% through 1cm of chicken breast, penetrating up to 20mm, against up to 10mm for 532nm green (Aldalawi et al., Journal of Lasers in Medical Sciences, 2023).
• Transcranially, red and near-infrared at 630 to 810nm reach 0.2% to 10% through human scalp and skull, and the review authors explicitly called for further quantitative estimation (Salehpour et al., Photobiomodulation, Photomedicine, and Laser Surgery, 2019).
• A 2017 modeling study found maximum penetration of 5.4mm at 750nm using a 1% criterion, but the model stopped at 750nm and contains no data for 810 or 850nm (Ash et al., Lasers in Medical Science, 2017).

The honest summary: the direction is well supported and the specific millimetre figures are not. Near-infrared penetrates further than visible red. Anyone who tells you exactly how much further, in millimetres, without citing a study that measured it, is repeating a number somebody made up.

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What does a tanning salon red light bed actually emit?

Visible red, usually only visible red, and often a single dominant wavelength. The best-documented example is the Ergoline Beauty Angel, the device inside Planet Fitness "Total Body Enhancement" booths, because someone actually put a spectrometer on one.

Independent spectrometer testing of the Beauty Angel RVT 30 (model 7200) found:

Ergoline's own brochure describes the device as using "special red lights tuned at 633 nanometers," never mentions near-infrared, and publishes no irradiance figure anywhere we could find. A European dealer lists a Beauty Angel unit around €16,080 before tax.

Note the discrepancy in that table: the vendor says 633nm, the independent measurement found a 620nm peak. That is not an accusation, it is a reminder that spec sheets and spectrometers do not always agree.

None of this makes the Beauty Angel a bad machine. It is a purpose-built device for skin and collagen applications, priced accordingly, and it has put red light in front of millions of people. Planet Fitness reported roughly 21.5 million members as of mid-2026, with 68% on the Black Card tier that includes Total Body Enhancement. That is a good product doing its job.

It is simply not the same category as a system emitting 810 to 850nm near-infrared, and a buyer comparing a $16,000 booth against a $90,000 bed should know they are not comparing two versions of one thing.

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What do full-spectrum commercial systems emit?

Visible red plus near-infrared, typically across three to five wavelengths. Here is what the major systems publish about themselves.

Every irradiance figure in that table, ours included, comes from the company selling the machine. Read the next section before you use any of them to compare products.

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Why can't I just compare irradiance numbers?

Because there is no standard for how irradiance is measured, and the photobiomodulation literature has been blunt about the consequences. None of the major vendors, including us, publishes the distance, aperture, or method behind its mW/cm² figure. Two honest manufacturers measuring the same machine different ways will report different numbers.

The criticism is on the record:

Manufacturers' values are typically measured at the aperture or fibre tip, but because the beams are highly divergent, they are not useful for studies where the beam may be projected to a target. — Hadis et al., Lasers in Medical Science, 2016

That same paper noted that measuring centrally on a Gaussian beam overestimates irradiance, and that 40% of low-level laser therapy studies fail to report beam area at all. A 2011 editorial in Photomedicine and Laser Surgery was blunter still, describing equipment "labeled with inaccurate parameters and sold with manuals that offer misleading treatment guidelines."

For context on what the research actually uses: published photobiomodulation work runs roughly 0.1 to 25 mW/cm² for wound healing and regeneration, and up to 150 mW/cm² for pain and inflammation applications (Arany, JADA Foundational Science, 2025). WALT, the World Association for Photobiomodulation Therapy, recommends above 5 mW/cm² with a maximum of 100 mW/cm² in its October 2022 dosage guidance.

What this means for you as a buyer. The gap between a ~13 mW/cm² beauty booth and a 100 to 165 mW/cm² clinical system is real and directionally meaningful. But you cannot rank two clinical systems against each other on published irradiance, because they are not measured the same way. Anyone selling you on their irradiance number being higher than a competitor's is comparing numbers that were never comparable.

Note also that several systems in this category, ours at 129 mW/cm² among them, publish figures above WALT's recommended 100 mW/cm² ceiling. Higher is not automatically better in photobiomodulation; the literature describes a therapeutic window rather than a more-is-more relationship, and WALT's guidance exists for that reason. Treat a very high published irradiance as a question to ask rather than a feature to buy.

If irradiance matters to your decision, the only answer that actually works is to ask for a third-party measurement at treatment distance, in writing, with the method stated. Most vendors cannot produce one. That itself tells you something.

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What can I actually verify about a machine?

Three things, and they are the three to build your comparison on.

1. Wavelengths. A vendor either publishes them or does not. If a vendor will not tell you what wavelengths a machine emits, that is the end of the conversation. If they publish a figure, you can verify it with a spectrometer, and independent reviewers do exactly that.

2. Regulatory status, and whose name it is in. This is where most buyers get confused, and the confusion is worth clearing up before you compare anything.

FDA maintains separate product codes for light-emitting devices depending on what they are intended for:

• NHN — "powered light based laser non-thermal instrument with non-heating effect for adjunctive use in pain therapy," 21 CFR 890.5500, Class II, 510(k) required, reviewed by the Physical Medicine panel.
• ONF — low-level laser systems for aesthetic use, 21 CFR 878.4810, Class II, reviewed by the General and Plastic Surgery panel.

Three distinctions that matter:

Cleared is not approved. FDA clearance through the 510(k) pathway means a device was reviewed as substantially equivalent to an existing device for a specific intended use. It is not FDA approval, which is a different and higher bar.

Neither is the same as registration. A facility registering with FDA is an administrative step. It says nothing about any device.

A clearance belongs to whoever obtained it. Commercial red light beds are frequently built by a contract manufacturer and sold under a reseller's brand. When a clearance exists, it typically sits with the manufacturer that filed it, covers the intended use stated in that filing, and does not transfer to you as the operator when you buy a machine.

So the useful question is not "is this FDA cleared." It is: what regulatory status does this specific device hold, under whose name, and for what stated intended use? Ask for it in writing. If a clearance number is provided, look it up yourself at accessdata.fda.gov, which takes about two minutes.

A vendor answering that question straight, including when the answer is "this device holds no clearance and is sold as a general wellness product," is giving you better information than one who leads with "FDA cleared" and cannot say whose clearance or for what.

Whatever the answer, the marketing constraint on you is the same. As an operator you cannot make disease or treatment claims regardless of a device's regulatory status, and a manufacturer's clearance for a particular intended use does not license you to advertise outside it.

3. Emitter count and total power draw. Both are physical and both show up on the nameplate and the electrical spec. A machine drawing 6 kW is doing something different from one drawing 1.5 kW, whatever either brochure says.

There is no standards body or trade association that formally classifies these devices into tiers. We looked. WALT and ASLMS define dosing and terminology, not equipment classes. So the FDA product code is the closest thing to an objective dividing line that exists.

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Which class should my facility buy?

Match the equipment to the service you intend to sell, and be honest about which one that is.

A beauty-class bed makes sense if your menu is skin-led, your clientele comes to you for appearance services, you already run tanning and want an adjacent offering, or your capital budget is $20,000 rather than $80,000. It is the right purchase for a real set of businesses and there is no shame in it.

A full-spectrum system makes sense if you are building a recovery or performance line, you share clientele with a gym, a physical therapist or a sports practice, or you want to sell into a recovery membership rather than a tanning membership.

One commercial note worth making plainly. Per-session pricing between the two classes overlaps more than vendors on either side admit. Facilities running full-spectrum systems publish anywhere from $35 to $95 a session. Tanning salons running beauty red light publish $45 a session and $65 a month. The clean separation is in capital cost, not in what you can charge. The argument for full-spectrum is the customer it lets you reach, not a price premium you can bank on.

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What should I ask a vendor before I buy?

Six questions. Any vendor who cannot answer all six in writing is one to be careful with.

1. What exact wavelengths does this emit, in nanometres? Not "red and infrared." Numbers.
2. What regulatory status does this device hold, under whose name, and for what intended use? If there is a 510(k) number, look it up yourself. "FDA cleared" with no number and no name attached is not an answer.
3. What irradiance, measured at what distance, using what method, by whom? Expect most vendors to have no answer beyond a number.
4. What is the total power draw and the nameplate maximum overcurrent protection? This determines your electrical install and whether your panel can take it.
5. What is the warranty, who performs service, and what is the parts lead time? Downtime on a commercial bed is lost revenue.
6. Can I speak to a facility running this exact model? Not a testimonial. A phone number.

On question four specifically, get the answer before you sign anything. A 6 kW bed is a real electrical load and a panel that cannot take it turns a $1,500 circuit into a $25,000 project. Our electrical requirements guide covers what to have an electrician check.

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What else do buyers ask about wavelengths?

What is the difference between red light and near-infrared light?

Red light is visible, roughly 620 to 700nm, and is absorbed at and near the skin surface. Near-infrared is invisible, above 700nm, with 810, 830 and 850nm most common in photobiomodulation. Near-infrared penetrates further because it falls inside the near-infrared window in tissue, roughly 650 to 1350nm, where blood and water absorb less.

What wavelengths should a commercial red light therapy bed have?

A bed serving a general clientele typically delivers visible red around 630 to 660nm plus near-infrared at 810, 830 and 850nm. Beds emitting visible red only are a different product class, built for skin and appearance applications and priced around a quarter to a fifth as much.

Does Planet Fitness Total Body Enhancement use near-infrared?

Independent spectrometer testing of the Ergoline Beauty Angel found a 620nm primary peak with secondary output at 546, 595, 700 and 705nm and no near-infrared detected in the 810 to 850nm range. Ergoline's own brochure describes it as tuned at 633nm and does not mention near-infrared.

How many wavelengths does a red light therapy bed need?

There is no established minimum. What matters is whether the set covers both visible red and near-infrared if you intend to serve recovery clients, since those are absorbed at different depths. More wavelengths is not automatically better; a machine listing five wavelengths at low power is not superior to one listing four at high power.

Is a higher irradiance number better?

Not comparably, because there is no standard for measuring it. No major vendor publishes the distance or method behind its mW/cm² figure, and the photobiomodulation literature has criticized manufacturers for measuring at the aperture rather than at the target, which overstates delivered irradiance. Published research uses roughly 0.1 to 25 mW/cm² for regeneration work and up to 150 mW/cm² for pain applications, and WALT caps its recommendation at 100 mW/cm².

How can I tell if a red light bed is a medical device or a beauty device?

Ask the vendor, in writing, what regulatory status the specific device holds, under whose name, and for what stated intended use. If a 510(k) number exists, look it up at accessdata.fda.gov. Code NHN covers powered light-based non-thermal instruments for adjunctive pain therapy, and ONF covers aesthetic use. Many beds, including beauty-class units sold through tanning distribution, hold no clearance and are sold as general wellness products.

Does FDA clearance transfer to me when I buy the bed?

No. A 510(k) clearance belongs to the manufacturer that obtained it and covers the intended use stated in that filing. Commercial beds are often built by a contract manufacturer and sold under a reseller's brand, so the clearance, where one exists, sits with the builder. It does not license you to advertise outside that intended use.

What is the difference between FDA cleared, FDA approved, and FDA registered?

Cleared means a device passed 510(k) review as substantially equivalent to an existing device for a specific intended use. Approved is a higher bar applied to higher-risk devices. Registered is an administrative step a facility takes and says nothing about any device. The three are routinely used interchangeably in marketing and should not be.

Why do commercial red light beds range from $15,000 to $100,000?

Almost entirely because of what they emit and how much power they deliver. Beauty-class beds emitting visible red only run $15,000 to $20,000. Full-spectrum systems adding near-infrared run $60,000 to $100,000, with TheraLight publishing $84,997 to $99,997 and Prism Light Pod at $95,995.

Do more LEDs mean a better bed?

Not on its own. Emitter count is a real, verifiable number and it correlates loosely with output, but a bed's usefulness depends on which wavelengths those emitters produce and how much power the system actually delivers. Compare emitter count alongside wavelengths and total power draw, not instead of them.

Can a spectrometer verify what a bed emits?

Yes, and independent reviewers do exactly this. It is why the Beauty Angel measurement exists. If a wavelength claim matters to your purchase, it is verifiable in a way that irradiance claims currently are not.

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The short version

Red light and near-infrared are different wavelengths that behave differently in tissue, and beds that emit only visible red are a different product class from beds that add 810 to 850nm, at roughly a quarter of the price.

Of the specs vendors advertise, wavelengths, FDA clearance status, emitter count and power draw are verifiable. Irradiance, as published today, is not, because no one states how they measured it. Build your comparison on the first four and treat the fifth with suspicion, including when it comes from us.

Then match the machine to the service you actually intend to sell. A beauty-class bed in a skin-led practice is a better purchase than a $90,000 system you bought because the brochure had bigger numbers.

Full published specs for both of our commercial units, including wavelengths, emitter count and electrical requirements, are on the commercial red light therapy beds page. If you want the comparison run against a specific competing machine, request a quote and tell us which one.

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Sources

• Near-infrared window in biological tissue, 650–1350nm — Smith, Mancini & Nie, Nature Nanotechnology 4:710, 2009; Wang & Wu, Biomedical Optics, Wiley, 2007
• 660nm tissue transmission versus 532nm — Aldalawi et al., Journal of Lasers in Medical Sciences, 2023;14:e28
• Transcranial red and near-infrared penetration 0.2–10% — Salehpour et al., Photobiomodulation, Photomedicine, and Laser Surgery, 2019;37(10):581–595
• Maximum penetration modeling to 750nm — Ash et al., Lasers in Medical Science, 2017;32(8):1909–18
• Ergoline Beauty Angel RVT 30 spectrometer measurement, 620nm peak, no near-infrared, ~13 mW/cm² — Light Therapy Insiders, updated July 2026
• Ergoline Beauty Angel brochure, "tuned at 633 nanometers," no irradiance published — Ergoline Beauty Angel brochure PDF
• Beauty Angel ELT 2 dealer pricing — sunmarket.es, September 2026
• TheraLight 360 and 360i wavelengths, irradiance and pricing — DaVinci Medical USA, September 2026
• Prism Light Pod wavelengths, irradiance and pricing — prismlightpod.com and RecovAthlete, September 2026
• NovoTHOR wavelengths and quote-only status — novothor.com/technology
• Trifecta irradiance claim — trifectalight.com
• LIT Method Lumé wavelengths, irradiance and pricing — litmethod.com, September 2026
• Irradiance measurement criticism, aperture versus target — Hadis et al., Lasers in Medical Science, 2016;31(4):789–809
• Inaccurate equipment labeling — Enwemeka, Photomedicine and Laser Surgery, 2011;29(12):783–4
• Photobiomodulation irradiance ranges in published research — Arany, JADA Foundational Science, 2025;4:100045
• WALT dosage recommendations, maximum 100 mW/cm² — World Association for Photobiomodulation Therapy, revised October 2022
• FDA product code NHN, 21 CFR 890.5500 — accessdata.fda.gov
• FDA product code ONF, 21 CFR 878.4810 — accessdata.fda.gov
• Planet Fitness membership and Black Card penetration — Planet Fitness Q2 2026 earnings release and call transcript, August 2026
• Facility session pricing — Beverly Hills Rejuvenation Center, The Green Room PT, Cienega Medical, SunsUp Tan & Wellness published pricing, September 2026

This article is equipment and business guidance, not medical, legal, or financial advice. Luxlight Therapy sells full-spectrum commercial red light equipment and has a commercial interest in this comparison. Figures attributed to manufacturers are as published by them and are not independently verified except where noted. Red light therapy should be offered as a wellness, recovery, and appearance service and never marketed as treating, curing, or preventing disease.