The topeak whitelite hp 1w aa provides 7 lux intensity for maximum visibility at all times thanks to its incredibly tough and compact design it can be used as both a flashlight and handlebar light using 3 aa batteries you can run the light for up to 12 hours or 4 hours at full beam this ensures you receive full visibility in all conditions for a safe riding experience topeak whitelite hp 1w aa features 3 high power white led head lights 2 modes constantflashing optional cap clip