We are currently using the Angel Eye Headlight Accent Lights 60mm Blue and they worked great for us for vision tracking at our latest competition.
http://www.superbrightleds.com/cgi-bin/store/index.cgi?action=DispPage&Page2Disp=%2Fmini_tubes. htm
We just placed it right over the camera (M1011). We do get a dimming effect when we start up our cannon motors, however this has not yet affected our camera tracking.