Dimensions: 2.625"; Battery: 1 AA Cell; Light Features: LED l Clip l High: 138 Lumens for 1h 10m l Low: 1.5 Lumens for 55h; Other Info: Glow-in-the-dark diffuser. CREE XP-G2 R5 LED. Body machined of solid billet ultra conductive pure alloy 101 copper. Bulk Packed.