Measurement reports and certificates
Every irradiance figure Dermfix publishes is listed on this page, together with how it was measured, by whom, at what distance and on what date. Where a measurement was made by an independent accredited laboratory we name the laboratory, its accreditation and the certificate number. Where a measurement was made on our own equipment we say so plainly.
Independent laboratory measurement — Dermfix SLF1800
The irradiance of the Dermfix SLF1800 was measured by LightingLab Calibration Laboratory Ltd. of Veszprém, Hungary — an independent calibration laboratory accredited to ISO/IEC 17025 under registration NAH-2-0368/2023. Accreditation means the laboratory's methods, instrument calibration and measurement uncertainty are themselves audited by a national accreditation body.
| Panel | Dermfix SLF1800 |
| Laboratory | LightingLab Calibration Laboratory Ltd., Veszprém, Hungary |
| Accreditation | ISO/IEC 17025, NAH-2-0368/2023 |
| Certificate number | LL-26-6174 |
| Date of measurement | 2 November 2026 |
| Measurement point | Centre of the panel, on axis |
| Initial output at 15 cm | 83.3 mW/cm² |
| Initial output at 30 cm | 73.8 mW/cm² |
| Sustained output at 15 cm, after 10 minutes | 74.0 mW/cm² |
| Sustained output at 30 cm, after 10 minutes | 65.7 mW/cm² |
We publish both the initial and the sustained figure because LED panels lose output as they warm up. A panel quoted only at switch-on will always read higher than the same panel ten minutes into a session. The sustained figure is the one that describes a real session.
How we measure our own panels
The irradiance figures for the RLF range are our own measurements, taken on a Hopoocolor OHSP350IR spectrometer. They are not independent laboratory measurements and we do not present them as such.
Every figure is taken at a stated distance of 15 cm, on axis, at the centre of the panel. We do not quote a single peak reading, we do not measure at the LED surface, and we do not add several wavelengths together to make the number larger.
| Panel | Irradiance at 15 cm | Measured by |
| Dermfix RLF750 | 82 mW/cm² | Dermfix spectrometer |
| Dermfix RLF1500 | 89 mW/cm² | Dermfix spectrometer |
| Dermfix RLF3000 | 90 mW/cm² | Dermfix spectrometer |
| Dermfix RLF6000 | 92 mW/cm² | Dermfix spectrometer |
| Dermfix SLF1800 | 83.3 mW/cm² | LightingLab, ISO/IEC 17025 |
A spectrometer measures light wavelength by wavelength. A solar meter is calibrated for sunlight and reads far too high on LED light, often two to three times higher. A figure measured on a solar meter is not comparable with a figure measured on a spectrometer, whoever publishes it.
CE conformity
Dermfix GmbH draws up the EU Declaration of Conformity for the panels it places on the market. Conformity is assessed by internal production control, Module A; no notified body is involved, which is the correct route for this product class.
| Declaration of Conformity | DF-DoC-RLF-001, Revision 03, 12 October 2026 |
| Skin exposure to optical radiation | EN 60335-2-27 |
| Photobiological safety | IEC 62471, Risk Group 2. Wear the supplied eye protection during use. |
| Electromagnetic compatibility | EMC Directive |
| Hazardous substances | RoHS Directive |
EN 60335-2-27 is the safety standard for appliances that expose human skin to optical radiation. It is not a medical device approval and we do not claim it as one. Note 105 of EN IEC 60335-2-23, the standard for skin or hair care appliances, states that that standard does not apply to appliances for skin exposure to optical radiation. A red light panel exists to put optical radiation onto skin, which places it inside EN 60335-2-27.
What a meaningful measurement report contains
If you are comparing panels, these are the things worth looking for, on our reports and on anyone else's.
- The wavelengths actually present, measured rather than listed on the box
- Irradiance in mW/cm² with the measuring distance stated
- Whether the reading came from a spectrometer or a solar meter
- Whether the figure is a centre reading or an average across the panel area
- Whether the panel was measured cold or at operating temperature
- The name of the laboratory and the report or certificate number, so the figure can be checked
What we do not yet publish
Two things, stated so you are not left to guess.
The LightingLab measurement of the SLF1800 is a centre-of-panel reading. It is not an area-averaged figure across the whole panel face. An area average is a more demanding measurement and a lower number than a centre reading on any panel, ours included. Where another brand publishes an area average, that figure is not directly comparable with a centre reading, in either direction.
The RLF range has not been measured by an independent laboratory. Those figures are ours, taken as described above.