Three superbright, white LEDsRun Times: 80 hours in Constant Mode and 320 hours in Flashing ModeTool-free Flex-Tight mount is secure; fits all bar diametersOptiCube lights use superbright, long-running, white LED technologyLED upgrade lights are now 50% brighter than previous year's versions80 candlepowerTwo AA batteries included Item SpecificationsBattery SizeAAWeight94BatteryAlkaline