The Smart 1/2 Watt rear bike light is very impressive for its price point. With visibility from up to a mile behind, you can be sure driver’s will notice you. The single ½ Watt LED with 2 additional flanking LED’s produce a powerful beam and excellent side visibility for extra safety. You get two different light modes from this rear light – constant and flashing. The run times are very impressive. On constant beam you get a maximum of 30 hours of brightness, which rockets up to 190 hours on flashing. A simple, yet effective light source for your bike. Features Visible from up to 1 mile with high powered 1/2 Watt LED, plus 2 further red LEDs, 2 modes; constant and flashing, Up to 30 or 190 hours run time in constant or flashing modes.