Nitecore P12Gt Flashlight Cree XP-L Hi V3 LED, 1000 lm Premium Cree xp-l hi v3 led Maximum output up to 1000 lumens Crystal coating technology combined with precision digital optics 1000 lumens - 1 hour 280 lumens - 5 hours 15 minutes 55 lumens - 28 hours 1 lumen - 520 hours 1000 lumens - 45 minutes 280 lumens - 3 hours 30 minutes 55 lumens- 20 hours 1 lumen- 300 hours