We once did this for iSTAR. We used a set of 3 small LED panels, clamped to each of the tripod legs.
Here's some images: https://www.dropbox.com/sh/lzovlqvxr6umduf/AAAMX2QqE_fmxBv6zlmw82Nfa
This is all off the shelf kit you can get from practically any inline photographic dealer.