Rear light for rack

[HorTs]

Does anyone have a recommendation for a rear light that will fit to the rack?

 

[GrumpyGregry]

One from the Busch+Müller Toplight Range

 

[HovR]

If you want battery powered, then the Mars 4.0. It comes with a specific rack mount, however if you have a cheap rack like mine without the correct holes for mounting it may require drilling out!

It's an extremely bright light.

 

[PpPete]

both Smart and Cateye have brackets (some sold separately) that fit to a rack.