The KOMA Light is a small USB rechargeable light that can be bolted on to your bike in a bunch of different ways. You could utilize basically any braze-on, bolt it to a front or rear rack, or maybe get creative and make your own mount. The KOMA lights are about 20 lumens and both have two settings (steady and flash).
Available as front (white) or rear (red) light with an anodized aluminum body.
A full charge will last from 8 hours to about 20 hours depending on which setting you use and it takes about 2 hours to fully charge.
Comes with pictured hardware. (M5 & M6 bolts and some washers)