Mount your Cygolite Hotshot Tail Light to your rear rack instead of to your seatpost with this bracket.
Fits racks with one centered mounting hole, or with two holes spaced 50mm apart.
CygoLite Hotshot SL 2W USB Tail Light-Includes USB
CygoLite Metro 500 USB Rechargeable Headlight
Planet Bike Tail Light Clip