Cateye Rear Multi-Mount Bracket

I recommend this product

This is perfect for permanently mounting rear CatEye lights onto a bike rack or similar. I've now used one on both my bikes. I'm not sure whether it fits all rear light models, but its easy to fit and the lamp then just clicks in and can be locked into place with a screw or M4 nut and bolt

I recommend this product

If you want a cateye light on the very back of your pannier rack and you rack has the standard holes at 80mm or 50mm apart then this is the bracket for you!

It simply screws onto the back of the pannier rack and there's even a little screw you can use to stop the light jumping out of the bracket on bumpy terrain. If you plan to remove your light after every ride as I do, the little screw might get annoying. Personally I double wrap an elastic band over the light / fitting connecting so it won't jump out. The bracket alone is almost certainly strong enough to keep the light in anyway.

I recommend this product

Good product and mounts easily on rear carrier