Mounting a rear light on a rack

[Deleted member 1258]

One of these should fit straight onto the bracket on the rear of the carrier, its very similar to the one I have fitted to the carrier on my Pearson.
http://www.evanscycles.com/products/busch-muller/d-toplight-permanent-4-led-rear-light-ec009137

 

[Ergates]

Cateye seem to do some fittings down to quite smal sizes (12-13mm). Not sure if these are quite small enough, but maybe with a bit of old inner tube it might hold...