A friend asked if I could find a light that meets these specifications:
“high lumen blue spectrum light. Something for Fluro diving. Something in the 400-455 nm spectrum. Something comparable to the Nightsea light or the http://firedivegear.com/product/mini-blueflame/”
i-torch 6+ has 2 purple led’s at 420nm. now it’s not as bright as a dedicated fluorescence dive light but you get white-2800 lumens, red couple-hundred lumens and purple from the same light…. that comes with an extra easily replaceable 32650 battery.