Safety & Certification
Independently tested to the international photobiological safety standard for lamps, and classified in the highest of its four categories.
IEC 62471 — Exempt Group
Photobiological safety of lamps and lamp systems · Report No. LCSB09015051S
What "Exempt Group" Means
IEC 62471 sorts every light source into one of four categories. There are three above ours, and none below.
Poses no photobiological hazard under normal use
MEINNOLow risk — no hazard under normal behavioural limits
Moderate risk — relies on the eye's natural aversion response
High risk — hazardous even on momentary exposure
Exempt Group is the classification a light source receives when it exceeds none of the standard's exposure limits — not for ultraviolet, not for blue light, not for thermal or infrared hazard.
The Actual Numbers
Measured at 200mm, the distance the standard specifies. Every value sits below the Exempt Group limit — most of them by orders of magnitude.
| Hazard measured | Exempt Group limit | Measured |
|---|---|---|
| Red light mode · 670nm | ||
| Actinic ultraviolet | 0.001 W·m² | 0.000012 |
| Near ultraviolet | 10 W·m² | 0.000019 |
| Retinal blue light | 100 W·m²·sr | 0.00419 |
| Infrared, eye | 100 W·m² | 0.00015 |
| Blue light mode · 480nm | ||
| Actinic ultraviolet | 0.001 W·m² | 0.000000022 |
| Near ultraviolet | 10 W·m² | 0.00000048 |
| Retinal blue light | 100 W·m²·sr | 7.21 |
| Infrared, eye | 100 W·m² | 0.00 |
Worth noting the one people ask about: in blue light mode, the retinal blue light figure is 7.21 against a limit of 100. Even the mode that produces blue light sits at roughly seven percent of the threshold for the safest category.
Using It Safely
Four things built into the product, and four situations where you should check first.
Sixty-second ramp
Output rises gradually over the first minute of every session, so your eyes adapt rather than being hit at full brightness.
Timers, not a switch
There's no "always on" setting. Every session ends on its own at ten, fifteen or twenty minutes.
No ultraviolet
Both wavelengths sit far from the UV range, and the measured UV output is effectively at the noise floor.
Diffuse, not focused
These are low-intensity LEDs spreading light across the inner surface of the frame. There is no beam and no laser.
Check with a professional first if
- You have any diagnosed eye condition, or have had eye surgery recently.
- You take medication that increases sensitivity to light.
- You have a history of light-triggered migraine or seizures.
- You're considering it for a child — it isn't intended for children.
Want to see the report?
Email us and we'll send the full sixteen pages. We'd rather you read it than take our summary for it.
Request the reportIEC 62471 is a test standard for the photobiological safety of lamps, not a medical approval or an endorsement. MEINNO is a general wellness device. It is not an FDA-authorised medical device and is not intended to diagnose, treat, cure or prevent any disease. The badge shown on this site is our own design; IEC does not issue one.