Nitesun B58 is a high power LED flashlight. This light utilizes one CREE XM-L2(U4) LED and can reach max 750 lumens output. Powered by one 18650 battery, max run time is 20 hours. The tail-cap switch offers multiple choices on modes to meet different needs. IPX-8 standard waterproof features and 500 meters long beam distance, Nitesun B58 is one of your best choices for military, hunting and outdoor lighting. Custom service for mode, package, and accessories are available.