Ride your bike with optimum safety with the Solar Energy Bike Tail Light. Requiring no batteries, this tail light is totally powered by energy from the sun. One full charge from the sun will give the Solar Energy Bike Tail Light four to eight hours of light time. Using two bright LED bulbs, this light has three modes for safety. Use quick flash to be seen in any conditions, a slower flash for more suitable conditions, or continuous lighting to always be visible. The Solar Energy Bike Tail Light fits 90% of bikes on the market with its fully adjustable diameter design. It’s waterproof so you can use it in even the worst weather and is environmentally friendly. Make sure you’re always seen on the road with the Solar Energy Bike Tail Light.