Fenix HL23 150 Lumen light weight CREE XP-G2 R5 LED Headlamp (Cadet Grey color) with EdisonBright AA alkaline battery bundle 150 lumen using Cree XP-G2 R5 LED with a lifespan of 50,000 hours Uses one AA (Ni-MH, Alkaline) battery Digitally regulated output maintains constant brightness and 60 degree tilt mechanism Fast, convenient all-in-one button switch and reverse polarity protection guards against improper battery installation This bundle includes one EdisonBright AA alkaline battery