I tested the power and battery life of this lamp TIKKA RXP at sea during a squid fishing. This one is done at night under lights, we were two fishermen one with a plain front and I with my TIKKA RXP. My beam was perfectly white and powerful, well defined on the water. The other was yellow beam and diffuse. Result: after 1 hour of fishing, only my TIKKA RXP working and all the squid were caught in its beam. No comment!