We read everything. We answer most things within a few working days. Including the URL of the page you are writing about saves a round trip.

What to write about

Report an error
Point us at the page and tell us what is wrong. Evidence helps but is not required — we will check it either way. Confirmed errors are corrected and logged in the page change history. Corrections policy.
Submit a product for review
Tell us the model, where it is sold in the US, and what documentation you can supply — particularly irradiance measured at a stated distance. Supplied units are disclosed prominently on the review and on any ranking. We do not accept review conditions or pre-publication approval. How we test.
Ask about our methodology
Questions about how something was measured, or why a product scored the way it did, are welcome. If the methodology page does not answer it, that is a gap worth fixing. Review methodology.
Media and licensing
Use of our measurements or photographs requires attribution and a link. Get in touch before republishing. Terms of use.

What we cannot help with

We cannot give medical or skincare advice. We are not clinicians, and we cannot tell you whether a device is suitable for your skin, your medications or your medical history. Please ask a qualified healthcare professional. See our medical disclaimer.

We also cannot help with warranty claims, returns, order status or faults with a device you bought — those go to the retailer or manufacturer. We are not affiliated with any of them.

Link exchanges and guest posts

We do not accept guest posts, sponsored articles, link insertions or link exchanges. Emails proposing them will not receive a reply.