The Planet Bike Rack Bracket is definitely the way to go. $5 shipped. I have one on the back of my bike. Ironically, it's not attached to the rack at all - I ride a folder with 16" wheels, so my rack is VERY low to the ground - too low for good visibility.. I have a Wald rack top basket attached to my rack, and the bracket is ziptied to the back of the basket. Works great. I did have a problem once where the light was caught in an elevator door and was pulled off. The light was OK but one side of the bracket sheared off. Planet Bike replaced the bracket for free, no hassle at all.