Zebralight H31w XP-G Neutral White Headlamp Cree XP-G Neutral White LED Headlamp 189 Lumens using one CR123A lithium primary or RCR123 Li-ion rechargeable battery Electronic soft-touch switch, with a 200,000 cycle operating life Smart user interface provides fast and easy access to all brightness levels Precision machined casing from premium grade Alcoa aluminum bar stock. Waterproof to IPX8.