If you've been shopping for FDA cleared red light therapy devices or an FDA-cleared LED mask, you've probably noticed that some brands prominently advertise "FDA cleared" while others say "FDA registered" β and many say nothing at all. The terminology is confusing, the marketing is often deliberately vague, and most buyers don't know what these labels actually mean in practice.
Here's the short version: FDA clearance and FDA registration are very different things. One involves meaningful regulatory review; the other is essentially a paperwork requirement. Understanding the distinction will help you evaluate marketing claims more critically, decide whether FDA status should influence your purchase, and determine whether your device qualifies for HSA/FSA reimbursement. In this guide, we'll break it all down.
How we researched this: clearance details were checked on October 16, 2026 against FDA 510(k) records, the FDA's Global Unique Device Identification Database (GUDID), the Code of Federal Regulations, and brand and retailer pages. We haven't tested these devices ourselves. We earn a commission if you buy through our links, at no extra cost to you.
Table of Contents
- FDA Regulation of Red Light Therapy: The Basics
- FDA Cleared vs FDA Registered: The Critical Difference
- FDA Cleared vs FDA Approved
- What FDA Clearance Actually Covers (and Doesn't)
- FDA-Cleared LED Masks: What We Could Verify
- FDA Status of Popular Red Light Panel Brands
- How to Check a 510(k) Yourself
- Does FDA Clearance Actually Matter for Buyers?
- FDA Status and HSA/FSA Eligibility
- Red Flags: Misleading FDA Claims
- Our Recommendation
- Frequently Asked Questions
FDA Regulation of Red Light Therapy: The Basics
The U.S. Food and Drug Administration (FDA) regulates medical devices by risk class, and every device type has a three-letter product code. A handful of codes cover most of what you'll see in red light therapy:
| Product code | What it covers | Regulation & class | 510(k) needed? |
|---|---|---|---|
| ILY | Infrared lamp for therapeutic heating — where most red/NIR panels are listed | 21 CFR 890.5500, Class II | No — exempt when it's an infrared therapeutic heating lamp (within the limits in 21 CFR 890.9) |
| OHS | Light-based over-the-counter wrinkle reduction — LED face masks | 21 CFR 878.4810, Class II | Yes |
| OAP | Over-the-counter laser hair-growth combs, caps and helmets | 21 CFR 890.5500, Class II | Yes |
That first row explains most of the confusion. Under 21 CFR 890.5500, an infrared lamp is Class II, but when it is “an infrared therapeutic heating lamp” it is “exempt from the premarket notification procedures.” So a panel maker can legally sell a panel without a 510(k), as long as it registers, lists the device and stays within the exemption. When we looked up the Joovv Solo, Joovv Go 2.0 and PlatinumLED BioMax 300 in the FDA's GUDID database, all three were listed under ILY and marked exempt from premarket submission. Masks are different: wrinkle claims fall under OHS, which does require a 510(k), so “FDA-cleared” is a meaningful distinction when you compare masks. (Acne devices, often blue light, have their own code, OLP.)
Class II devices are considered moderate-risk. They require more regulatory oversight than Class I devices (like bandages) but less than Class III devices (like pacemakers). Unless a device type is exempt, the pathway for Class II devices is the 510(k) premarket notification, commonly called "FDA clearance."
However β and this is where the confusion begins β not every red light therapy device on the market has gone through this process. Some are sold as general wellness products rather than medical devices, some are FDA registered but not cleared, and some operate in a regulatory gray area that the FDA hasn't actively enforced against. The landscape is more complicated than any single brand's marketing would suggest.
FDA Cleared vs FDA Registered: The Critical Difference
This is the single most important distinction that red light therapy buyers need to understand, because brands frequently conflate these two very different statuses.
FDA Cleared (510(k) Clearance)
What it means: The manufacturer submitted a 510(k) premarket notification to the FDA, demonstrating that their device is "substantially equivalent" to a legally marketed predicate device. The FDA reviewed the submission β including safety data, device specifications, performance testing, and labeling β and agreed that the device may be marketed for its stated indication.
What it requires: Biocompatibility testing, electrical safety testing (IEC 60601 compliance for medical devices), performance data, proper labeling, and documentation that the device is substantially equivalent to a predicate. FDA's review fee alone was $26,067 for a standard 510(k) in fiscal year 2026 ($6,517 for qualifying small businesses), before the cost of testing and preparing the submission.
What it tells you: The device has undergone a formal regulatory review for safety and basic efficacy for its cleared indication. The manufacturer follows quality system regulations (21 CFR Part 820) and is subject to FDA inspection.
FDA Registered (Establishment Registration & Device Listing)
What it means: The manufacturer has registered their business establishment with the FDA and listed their device in the FDA's device database. This is a legal requirement for anyone manufacturing or distributing medical devices in the United States.
What it requires: Filling out forms and paying an annual registration fee ($11,423 for FDA's fiscal year 2026). There is no FDA review of the device's safety, performance, or marketing claims.
What it tells you: The company exists and has complied with a basic administrative requirement. It does not mean the FDA has reviewed, tested, evaluated, or endorsed the device in any way.
To put it bluntly: FDA registration is to FDA clearance what having a driver's license is to passing an advanced driving course. One is a basic legal prerequisite; the other involves actual evaluation of competence. When a red light therapy brand says "FDA registered" prominently on their marketing page, they may be hoping you'll confuse it with clearance. Don't.
FDA Cleared vs FDA Approved: Another Common Confusion
Even the term "FDA cleared" is sometimes confused with "FDA approved." These are different regulatory pathways with very different levels of scrutiny.
510(k) Clearance vs PMA Approval
510(k) Clearance: Shows substantial equivalence to a predicate device. Does not require independent clinical trials. Most Class II devices that need premarket review — including LED masks — use this pathway. Faster and less expensive.
Premarket Approval (PMA): Requires extensive clinical evidence of safety and effectiveness. Used for Class III high-risk devices like implants, defibrillators, and some laser systems. Much more rigorous and expensive β often hundreds of thousands to millions of dollars. No consumer red light therapy panel has gone through PMA.
When a brand says their device is "FDA approved," they're almost certainly using the term incorrectly. The correct term for a red light device that went through a 510(k) is "FDA cleared." While this distinction might seem pedantic, it matters β using "FDA approved" when the device is only 510(k) cleared is technically a regulatory violation and may indicate the brand isn't as careful with its claims as it should be.
What FDA Clearance Actually Covers (and Doesn't)
Even when a red light therapy device is legitimately FDA cleared, it's important to understand the scope and limitations of that clearance.
What Clearance Typically Covers
Every clearance is tied to a specific indication for use. Light devices are usually cleared for one of a few things: wrinkle reduction (LED face masks, code OHS), hair growth in androgenetic alopecia (laser caps and combs, code OAP), acne (code OLP), or temporary relief of minor muscle and joint pain (infrared lamps that went through a 510(k)). The indication on the clearance is what the FDA reviewed — not everything on the box.
The clearance covers:
- Electrical safety (the device won't electrocute you or cause a fire)
- Biocompatibility (materials in contact with skin are safe)
- Performance and labeling for the cleared indication
- Proper labeling (warnings, instructions, and indications are appropriate)
What Clearance Does NOT Cover
510(k) clearance does not independently verify or endorse:
- Claims outside that device's own cleared indication (a mask cleared for wrinkles isn't cleared for sleep or mood)
- Claims about weight loss, cellulite, or fat reduction
- Claims about mood, sleep, testosterone, or cognitive benefits
- Specific irradiance output numbers or dosing claims
- Superiority over competing devices
- Long-term efficacy for chronic conditions
A device can be FDA cleared for temporary pain relief while the brand simultaneously makes uncleared marketing claims about skin and hair benefits on their website. The clearance doesn't extend to those additional claims.
This is a critical nuance. FDA clearance gives you confidence in basic safety and manufacturing standards, but it doesn't validate the full range of benefits that many red light therapy companies advertise. You still need to evaluate clinical evidence and user data for specific use cases independently β see our guides on red light therapy for skin, red light therapy for pain, and red light therapy for hair growth for condition-specific research.
FDA-Cleared LED Masks: What We Could Verify
If you're shopping for an FDA-cleared LED mask, this is where clearance really separates products. Wrinkle-reduction masks fall under product code OHS (21 CFR 878.4810, Class II), and OHS devices aren't 510(k)-exempt. Here's what we could confirm as of October 16, 2026:
| Mask | FDA record | Cleared | Notes |
|---|---|---|---|
| CurrentBody Skin LED Light Therapy Mask Series 2 (MK-90H) | 510(k) K250966 | June 25, 2025 | OHS (wrinkles); applicant is the manufacturer, Shenzhen Kaiyan Medical Equipment |
| CurrentBody LED 4 in 1 Zone Facial Mapping Mask | 510(k) K242593 | Feb 14, 2025 | OHS (wrinkles) |
| CurrentBody Skin LED Multi Light Therapy Mask (MK-110D) | 510(k) K260715 | June 3, 2026 | OHS (wrinkles); applicant The Beauty Tech Group |
| Omnilux Contour FACE | 510(k) K191629 (linked in its GUDID listing) | Sept 12, 2019 | OHS (wrinkles); cleared under the device name faceLITE |
| Dr. Dennis Gross DRx SpectraLite FaceWare Pro | Brand says FDA-cleared; GUDID lists codes OHS and OLP but no public 510(k) number | — | Red + blue light for wrinkles and acne; $455 at Dermstore |
| Mito Red MitoGLOW | Brand says it has 510(k) clearance; we didn't verify a number | — | See our Mito Red review |
| Hooga LED Face Mask | No clearance claimed | — | Not cleared; $179 face, $99 neck, $249 combo |
Two things stand out. First, clearance follows the model: CurrentBody has separate 510(k)s for different masks, so check the exact model you're buying. Second, the 510(k) holder isn't always the brand on the box. CurrentBody's Series 2 clearance is held by its manufacturer, and the Omnilux Contour FACE listing points to a clearance held by I-Smart under another device name. That's normal — what matters is that the record matches the device.
Where the Hooga mask fits. The Hooga LED Face Mask isn't FDA-cleared, and Hooga doesn't claim it is. It uses 630nm, 660nm and 850nm LEDs and costs $179 for the face mask. If an FDA-reviewed wrinkle claim matters to you, buy a cleared mask. If you mainly want red + near-infrared light for less money, Hooga is a reasonable budget option — our Hooga LED mask review covers what you give up. To compare everything, see our best red light therapy masks and CurrentBody vs Omnilux guides.
FDA Status of Popular Red Light Panel Brands
Here's what public records and the brands' own pages show for panels, checked October 16, 2026. Status can differ by model, so always check the exact device.
Joovv
Status: Listed as 510(k)-exempt infrared lamps
In the FDA's GUDID database, the Joovv Solo and Joovv Go 2.0 are listed by Joovv, Inc. under product code ILY (infrared therapeutic heating lamp) and marked exempt from premarket submission. In other words, they didn't need a 510(k), and we didn't find a 510(k) clearance for a Joovv panel. That's how most panels are sold, but it means Joovv's premium price isn't paying for a clearance. More in our Joovv review.
PlatinumLED
Status: Listed as a 510(k)-exempt infrared lamp
GUDID lists the BioMax 300 (Platinum LED Holdings) under product code ILY and marks it exempt from premarket submission. Some third-party sites describe BioMax panels as “510(k) cleared” without giving a number; we couldn't confirm that. If clearance matters to you, ask the brand for the K number. More in our PlatinumLED review.
Hooga
Status: No FDA clearance claimed
Hooga's product descriptions for the PRO1500, HG1500 and PRO300 panels don't mention FDA status, and we didn't find a 510(k) for a Hooga panel. Panels like these generally fall into the 510(k)-exempt infrared-lamp category above. What Hooga does publish is specs: the PRO300, for example, is listed with 60 dual-chip LEDs (660nm + 850nm), “over 109 mW/cm² at 6 inches” and a 3-year warranty. More in our Hooga review.
Mito Red Light
Status: Registered; some products cleared
Mito's FAQ says the company “is registered with the FDA and a certain subset of Mito Red products have obtained 510(k) clearance,” naming the MitoGROW helmet and the MitoCLEAR and MitoGLOW masks. The same FAQ describes its plug-in panels as 510(k)-exempt devices. More in our Mito Red review.
Cheap Amazon/AliExpress Panels
Status: Varies — often unclear
Many budget panels sold on Amazon and AliExpress have unclear regulatory status. Some are registered and listed through a US importer; many show no listing at all. These devices also tend to lack published irradiance data or proper labeling. No listing doesn't automatically make a device dangerous, but it does mean there's no regulatory paper trail to check.
For a detailed breakdown of how these brands compare on specs, pricing, and performance, see our best red light therapy panels comparison and our buying guide.
How to Check a 510(k) Yourself (2 Minutes)
- Get the K number. Cleared devices have a 510(k) number like K250966. Look on the box, in the manual or in the brand's FAQ, or ask support. A brand that says “FDA cleared” but can't give you a number is a red flag.
- Search FDA's database. Enter the number in the FDA 510(k) Premarket Notification database. You can also search by device name or applicant.
- Match the device. Check that the device name or model number matches what you're buying. The applicant may be the manufacturer rather than the brand on the box.
- Read the product code and indication. OHS means wrinkle reduction, OAP hair growth, ILY an infrared heating lamp. The “Indications for Use” in the 510(k) summary PDF tells you exactly what was cleared.
- No K number? Try GUDID. The FDA's GUDID device database shows a device's product code and whether it's exempt from premarket submission — that's how we confirmed the panels above are listed as 510(k)-exempt.
Does FDA Clearance Actually Matter for Buyers?
This is the question at the heart of the article, and the honest answer is: it depends on your priorities.
When FDA Clearance Matters More
- HSA/FSA reimbursement: Some HSA/FSA administrators ask for proof that a device is FDA-cleared, or for a Letter of Medical Necessity. If you're planning to use pre-tax health funds, check with your plan first. See our HSA/FSA guide for details.
- Clinical or professional use: Healthcare providers using red light therapy in a clinical setting generally need to use FDA-cleared devices for liability and insurance reasons.
- Buying a mask for wrinkles: Among LED masks, clearance means the FDA reviewed the wrinkle-reduction claim for that model. That's a real differentiator, and it's one reason cleared masks cost more.
- Peace of mind: If knowing the FDA has reviewed a device gives you confidence, clearance provides that baseline assurance of safety and manufacturing quality.
- Insurance claims or documentation: If you need to document medical device use for insurance, disability, or legal purposes, an FDA-cleared device carries more weight.
When FDA Clearance Matters Less
- General home use: If you're buying a panel for home use from a reputable brand with published third-party testing, the practical safety and performance difference between an FDA-cleared and a non-cleared device is often minimal.
- Brands that publish specs: Most panel brands publish wavelength and irradiance figures (Hooga, for example, lists irradiance at 6 inches for its panels). Those numbers tell you more about a panel's output than its regulatory category does — though they're the brand's own figures.
- Panels in general: Since most panels are listed as 510(k)-exempt infrared lamps, “not FDA-cleared” is normal for panels and isn't a useful way to compare them. Compare wavelengths, irradiance, size and warranty instead.
- Uses outside the indication: Clearance only covers what was cleared. A mask cleared for wrinkles hasn't been reviewed for sleep, mood or anything else on the box.
The bottom line: FDA clearance is a meaningful quality signal, but it's not the only one β and it's not always the most informative one. For panels, a well-specced device from a transparent brand is usually the better buy. For masks, clearance is worth weighing more heavily.
FDA Status and HSA/FSA Eligibility
One of the most practical reasons to care about FDA clearance is its impact on whether you can pay for a red light therapy device with pre-tax health savings dollars.
The rules here come from your plan administrator and IRS guidance, not from the FDA. Some HSA (Health Savings Account) and FSA (Flexible Spending Account) administrators look for FDA clearance as evidence that a device is medical; many also accept — or require — a Letter of Medical Necessity for items that could have general wellness uses.
Some administrators will accept a Letter of Medical Necessity (LMN) from your physician β a letter stating that red light therapy is medically necessary for your specific condition (such as chronic pain, wound healing, or a dermatological condition). With an LMN, some plans will reimburse a device that isn't FDA-cleared.
The rules vary by administrator, so always check with your specific HSA/FSA provider before purchasing. For a complete walkthrough of the process, including LMN templates and which devices are most likely to qualify, see our dedicated HSA/FSA red light therapy guide.
Red Flags: Misleading FDA Claims to Watch For
Now that you understand the regulatory landscape, here are specific marketing practices to watch for when evaluating red light therapy brands.
π© "FDA Approved" Instead of "FDA Cleared"
No consumer red light therapy panel is FDA approved (PMA pathway). If a brand uses this term, they're either confused about their own regulatory status or deliberately misrepresenting it. Neither is a good sign.
π© "FDA Registered" Presented as Equivalent to Clearance
If a brand's marketing prominently features "FDA Registered" with a badge or seal, but never explicitly says "510(k) Cleared," they're relying on the visual impression of FDA endorsement without having earned it. Registration is a basic legal requirement, not an achievement.
π© No 510(k) Number Provided
Any legitimately FDA-cleared device has a public 510(k) clearance number (e.g., K######). You can search for it in the FDA 510(k) Premarket Notification Database. If a brand claims clearance but won't provide the number or the number doesn't match their device, be skeptical.
π© Clearance for One Device Applied to Entire Product Line
Some brands obtain 510(k) clearance for a single model and then imply their entire product line is cleared. Each device model requires its own clearance (or a determination that it's covered under a cleared device's specifications). Ask specifically about the model you're purchasing.
π© Health Claims Beyond the Cleared Indication
Even with a legitimate 510(k), a device is only cleared for its stated indication — wrinkles for an OHS mask, hair growth for an OAP cap, temporary pain relief for a cleared infrared lamp. A panel sold as an exempt heating lamp that's marketed to cure depression or reverse hair loss is making claims the FDA never reviewed.
Our Recommendation: What to Prioritize
Based on our research, here's how we'd rank the factors that actually matter when choosing a red light therapy device β with FDA status in context:
1. Wavelength accuracy and range. Does the device emit the wavelengths it claims? Are those wavelengths therapeutically relevant (typically 630β660nm red and 810β850nm near-infrared)? This is the foundation of whether the device works at all. See our wavelength guide.
2. Irradiance (power output). Higher irradiance means shorter treatment times and more effective dosing. Published third-party irradiance data at specific distances matters more than vague claims. See our irradiance guide.
3. Build quality and safety. Low EMF, low flicker, proper thermal management, and durable construction. See our EMF guide.
4. Brand reputation and transparency. Does the company publish third-party testing data? Do they have responsive customer support? What do independent reviewers say?
5. FDA clearance status. Worth paying for in a mask if you want an FDA-reviewed wrinkle claim, and helpful for some HSA/FSA plans. For panels, most are 510(k)-exempt, so it rarely separates good from bad.
6. Price relative to value. A well-specced Hooga panel can deliver better value than a pricier panel with similar specs — and clearance usually isn't the difference between them.
Hooga HGPro 1500
Best for: Buyers who prioritize performance and transparency over FDA clearance alone
The Hooga PRO1500 packs 300 dual-chip LEDs (660nm red + 850nm near-infrared in every LED) into a 36-inch panel, with a 3-year Hooga warranty. Like most panels, it isn't FDA-cleared and Hooga doesn't claim it is. For home users who don't need a cleared device for reimbursement, it's a strong full-size option.
- 300 dual-chip LEDs, 660nm + 850nm
- 36-inch panel for larger treatment areas
- 3-year warranty
- No FDA clearance claimed
Hooga HG1500
Best for: Budget-conscious buyers who want solid performance without paying a clearance premium
The Hooga HG1500 delivers 660nm + 850nm light from 300 LEDs, with Hooga listing irradiance of “well over 115mW/cm2” and a 3-year warranty, for $300 less than the PRO1500. It isn't FDA-cleared. If you don't need clearance for HSA/FSA purposes, it's a strong value per dollar.
- 300 LEDs, 660nm + 850nm
- Irradiance listed by Hooga as “well over 115mW/cm2”
- 3-year warranty
- No FDA clearance claimed
Hooga HGPro 300
Best for: Face, joints, or targeted areas where full-body coverage isn't needed
The Hooga PRO300 is a compact panel for the face, knee, shoulder or other targeted areas. Hooga lists 60 dual-chip LEDs (660nm + 850nm) and “an irradiance of over 109 mW/cm² at 6 inches,” with a 3-year warranty, for $299. A good entry point, or a second panel for spot treatment.
- 60 dual-chip LEDs, 660nm + 850nm
- Over 109 mW/cm² at 6 inches (Hooga's figure)
- 3-year warranty
- No FDA clearance claimed
The Bottom Line
FDA clearance is a meaningful quality signal β but it's not the whole story. Clearance tells you a device has passed a baseline level of safety review and that the manufacturer follows FDA quality system regulations. That's valuable information, and for some buyers (especially those using HSA/FSA or in clinical settings), it's essential.
But clearance doesn't validate claims beyond the device's cleared indication, doesn't guarantee superior irradiance or wavelength accuracy, and doesn't mean a cleared device is automatically better than a non-cleared one from a reputable brand. The red light therapy market includes excellent non-cleared devices — and most panels aren't cleared simply because, as infrared heating lamps, they don't need to be. For LED masks, clearance is a real differentiator; for panels, it usually isn't.
Our advice: Look at the full picture. Prioritize wavelength accuracy, irradiance, EMF/flicker performance, and brand transparency. Use FDA clearance as one signal among several, weighted more heavily if you need HSA/FSA eligibility or clinical documentation. And be skeptical of any brand that leans harder on regulatory language than on actual performance data. For more help choosing the right device, see our complete buying guide and best panels comparison.
Frequently Asked Questions
What does FDA cleared mean for red light therapy?
FDA clearance (a 510(k)) means the FDA reviewed a specific device model and found it substantially equivalent to a device already legally on the market, for a specific indication. For LED face masks that's usually wrinkle reduction (product code OHS); for laser caps it's hair growth (OAP). It doesn't cover benefits outside that indication.
Which LED face masks are FDA-cleared?
As of October 16, 2026 we verified 510(k) clearances for CurrentBody's Series 2 mask (K250966), 4 in 1 Zone Facial Mapping Mask (K242593) and Multi Light mask (K260715), and the Omnilux Contour FACE (K191629, per its FDA device listing). Dr. Dennis Gross and Mito Red say their FaceWare Pro and MitoGLOW masks are cleared, but we couldn't see a public 510(k) number. The Hooga LED mask is not cleared.
Is FDA cleared the same as FDA approved?
No. FDA clearance (510(k)) shows substantial equivalence to a device already on the market. FDA approval (PMA) requires extensive clinical evidence and is used for higher-risk devices. No consumer red light panel or LED mask has gone through PMA approval, so a brand that says “FDA approved” is using the term incorrectly.
What does FDA registered mean for a red light therapy device?
FDA registration means the company has registered its establishment and listed its device with the FDA, a legal requirement for selling medical devices in the US. It does not mean the FDA reviewed, tested or evaluated the device.
Why aren't most red light therapy panels FDA cleared?
Because most don't need to be. Panels are usually listed as infrared lamps (21 CFR 890.5500, product code ILY), and an infrared therapeutic heating lamp is exempt from 510(k) review. The FDA's GUDID database lists the Joovv Solo, Joovv Go 2.0 and PlatinumLED BioMax 300 this way, marked exempt from premarket submission.
How can I check if a red light device is FDA cleared?
Ask the brand for the 510(k) number (it looks like K250966) and search it in the FDA's 510(k) Premarket Notification database. Check that the device name matches and read the product code and indications for use. If there's no K number, the FDA's GUDID database shows whether a device is listed as exempt.
Do I need an FDA cleared red light therapy device?
For a panel, usually not: most panels are 510(k)-exempt, so compare wavelengths, irradiance and warranty instead. For an LED face mask, clearance means the wrinkle claim was reviewed for that model, which is worth paying for if that matters to you. Some HSA/FSA plans also look for clearance.
Is the Hooga LED mask FDA-cleared?
No. Hooga doesn't claim FDA clearance for its LED face mask. It costs $179 for the face mask ($249 with the neck piece) and uses 630nm, 660nm and 850nm LEDs. It's a budget alternative to cleared masks from brands like CurrentBody and Omnilux.
Can I use HSA or FSA to buy a non-FDA cleared red light device?
It depends on your plan administrator. Some look for FDA clearance; many accept or require a Letter of Medical Necessity from your doctor, which may allow reimbursement for a device that isn't cleared. Check with your plan before you buy.
Which red light therapy brands are FDA cleared?
It depends on the model, not the brand. CurrentBody and Omnilux have 510(k)-cleared LED masks, and Mito Red says its MitoGLOW and MitoCLEAR masks and MitoGROW helmet are cleared. Joovv and PlatinumLED panels we looked up are listed as 510(k)-exempt infrared lamps, and Hooga doesn't claim clearance for its panels or mask.
Does FDA clearance guarantee a red light therapy device works?
Not in the way most buyers expect. A 510(k) confirms substantial equivalence to an existing device for a specific indication. It doesn't verify every marketing claim, so still look at published research and the device's specs for your goal.
