Now here's a good idea for all those people who work with or near a computer all day. This light unit has its own rechargeable battery inside it, and recharges from a standard USB port.
It comes complete with its own small cable, which features a hinge at the end where it plugs into the computer. This prevents the light's weight from hanging on the USB port and potentially damaging it from accidentally being knocked out at an angle. The light itself gives a focused beam, just about bright enough for dark lane riding, but it also manages to offer very good visibility too, thanks to a semi-opaque lens area and deep side cutaways on the front. The mounting is a flexible band type with a quick release lever and it works quite well, although it won't fit wing-style bars.