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The Serfas Thunderbolt (USL-6) gives you high performance and endless mounting options, and is a stellar bargain buy. The 15- micro (double strength) LED strip puts out 90 lumens, giving you plenty of light as you safely ride to your destination. The light can be seen up to 1 mile away, giving cars ample time to move out of your path. With 3 light settings, you’ll always be ready for what’s ahead. You won’t find yourself riding to your local 24 hour pharmacy for batteries any more, as the USL-6 Thunderbolt is USB rechargeable!
Reviewed by 1 customer
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Comments about Serfas Thunderbolt Head Light:
Use this light for commuting from work to home at night. About a 45-minute ride. Cannot get through a work week on one charge. I use the blink mode, and I have to cycle though several other mode everytime I turn it on.