The Serfas USL-6 Thunderbolt (USB) Front Headlight gives you high-performance and endless mounting options for a great price. If you're riding at night, let Serfas guide the way with this rechargeableheadlight. The 15-micro (double strength) LED strip puts out 90 lumens, giving you plenty of lightto safely arrive at your destination. The USB-rechargeable Thunderbolt can be mounted virtually anywhere on the front of your bike's from the handlebars to the fork. It's your ride, your call. Chargeup, light up and get riding safely at night with the Thunderbolt.