Riding safely at night is easy if the Serfas Thunderbolt Headlight is guiding your way. 15-micro (double-strength) LED strip projects 90 lumens, giving you plenty of light up front. High, Low and two Flash modes run from 1 to 7 hours and help you stay visible to cars, cyclists and pedestrians. Thanks to its water-resistant silicone body, you can attach it just about anywhere on your bike. It weighs only 53g, so you'll hardly notice it's on your bike, plus it's USB rechargeable for added convenience.