How manufacturers report irradiance, why the numbers rarely compare directly, and the questions to ask before buying a panel.
Methodology
Our measurement protocol — fixed distances, a calibrated meter and an ambient baseline — is documented here. Measurements are in progress; no scores are published yet.
What we evaluated
- Full-body panels
- Compact panels
- Mask-format devices
Criteria
- Irradiance at a stated distance
- Wavelength accuracy
- Housing and driver serviceability
- Stand stability
- Warranty and support
Findings
- Irradiance figures are frequently quoted at unstated distances, which makes cross-brand comparison meaningless.
- Serviceable drivers are rare below a certain price point.
Limitations
Our own measurements are not complete. Treat the findings above as framing, not results.
Recommendation
Ask any brand for irradiance at 15cm and 30cm in writing before you order.
Earth-On sells some of the products discussed here. We do not accept payment for coverage or placement.
