The cateye ld 500 led red rear light features a large surface area for maximum visibility 3 leds and fitting kits to mount the light to either clothing bags or your bike uniting both cateyes reflector and led technology the tl ld500 incorporates a cpsc approved reflector into the light to make sure you are seen while on the road the light is switchable between flashing and constant modes run time is approximately 50 hours on constant or 100 hours on flashing