As you ride though a constellation of blinking brake lights and harsh headlights on dark commutes, Exposure Lights' Sirius Mk4 helps you stand out amid the chaos. Like the star it shares a name with, the 500 lumen light promises to stand out on its own and illuminate the roads on your commutes, allowing you to anticipate road obstacles to safely reach your destination. The Sirius, like all Exposure Lights, is crafted by hand in the UK with a USB rechargeable lithium ion battery, which will last anywhere from two to 36 hours depending on the mode. Exposure Lights also designed the Sirius to recharge with an integrated USB plug, so you can quickly give the light a boost before heading home from work or school. A fuel gauge displays battery life and the light mounts cleanly and securely to your handlebar with the included QR handlebar bracket.