Serfas' Thunderbolt Headlight delivers 90 lumens in an extremely versatile, USB-rechargeable package. Attach the water-resistant silicone body nearly anywhere on your bike, and use the high, low, or two flash modes to make sure cars, cyclists and pedestrians can see you at night. At just 50 grams, you won't even notice it's on your bike — but others will!
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First things first. I own a bike shop, so sure, I make money selling these things. But I ride 7200 miles/year on the road, and this is the very best front light I've found for daytime use. Yes, daytime. Didn't used to think it was a big deal, but there have been too many accidents lately during the day, when cyclists were simply missed or blended into the background. People seeing this light often do a double-take, which is awesome. Highly recommended. --Mike Jacoubowsky, Partner, Chain Reaction Bicycles