Blaze features Nichia's halfwatt Blazetm LED is many times brighter than a standard white LED. Up to 100 hours of run time on 2 AA batteries included. Superflash features Halfwatt BlazeTM LED plus 2 eXtreme LEDs for visibility up to 1 mile. Unique, eyecatching flash pattern. Up to 100 hours of run time on 2 AAA batteries included.