Sigma Sport's mighty little wonder, the Siggi, is an all-in-one micro-USB-rechargeable lithium-ion battery-powered headlight boasting a .5-watt LED for plenty of light to see, and also be seen from more than 400 yards. It charges in 3 hours and provides 5, 8 and 9 hours of run time with power, standard and flashing modes. A handy battery indicator shows how much power is left. Plus, the on/off button is easy to operate even with gloves on, and the Siggi's stretchy silicone mount offers nearly endless no-tools mounting options. This great light is even water-resistant.