We've all been there, out a bit longer than expected with the sun rapidly setting and without a rear light. However, with the Luminite and Xtract Helmet-compatible, Endura Rechargeable Helmet LED, you'll always have visible illumination so you're safe and seen when cycling. Up to 40 hours run time (on rapid-flash) means more riding time between charges and it's easy to recharge via USB 2.0.