Not a weapon mounted light but the S2R Baton I bought from Duane gets used a lot! More than once I have been gotten up at an ungodly hour to check on my 1YO or investigate a noise. The S2R is 1000 luminosity, either my eyes are broken or the sudden daylight doesn't effect me to the point I can't see. Sure it takes a second to adjust but that would be the same with any torch.