I bought this kit for my bike, because in low light conditions you will easily overlooked on the bike path. The LEDs are bright, and hold several hours. Since I'm charging the batteries after a few trips repeatedly, and not just wait until the batteries are empty, I can not say exactly how long they persevere. In any case, the near end is signaled by a red LED on the front light. The flashing functions I like that, in addition, it increases the attention. As a racing bike does not rely on lighting, you have the bulbs a good way to draw attention to themselves on the road.
