Quoted from OLDPINGUY:A USB Strip for TVs (5v) about $10, can be driven from GI (6.3v) with full affects.
A simple circuit will do the same thing using 12V lights, which are easier to find, and less expensive if you are doing multiple pins. I use the 5V leds for trough lights and to light dark sections (with gi effects). Your point is spot on, having GI effects is key, otherwise it looks like a mod.