This headlamp will attach to you hat, your helmet, or directly to your head to light your way safely. The lamp contains 1 ultra bright LED bulb with an extra large reflector for the maximum amount of light. The lamp adjust up and down for better range of light. This lamp produces a wide beam of light. Twist the side of casing to open battery cover – takes 3 AAA batteries.This lamp is1 watt of power to light your way. It has a single LED bulb that is ultra bright