NiteRider Lumina 650 Light Bulb Type: CREE LEDPower Source: Li-ionBackup Power Source: noBattery Location: internalBatteries Included: yes, rechargableVoltage Regulator: noModes: high, medium, low, walk, and flashBulbs: 1Lumens: 650Burn Time: 1.5 - 18 hoursWaterproof: noWeight: 172 gRecommended Use: night ridingManufacturer Warranty: 2 years