Product Information This is a versatile headlamp that uses a single AA battery and is lightweight and compact, yet still provides bright illumination. It features a high-brightness white LED (1 lamp) for walking and a warm white LED (1 lamp) that is easy on the eyes. It is also compatible with rechargeable Ni-MH batteries and lithium batteries. Warm White LED: 5 lumens / 5m / 115 hours High-Brightness White LED LOW: 20 lumens / 23m / 72 hours High-Brightness White LED HIGH: 60 lumens / 38m / 27 hours