I bought them from home depot or lowes. They are solar spot lights like this one.
I mounted them on the feeder pointing down, however the spot beam was narrow so I moved them away from the feeder, pointing to the feeder, worked much better, had a better area covered, I use 3 of them. Its a soft glow, from a 100 yds away you can only barely see the lighted area, but when you glass the area with bino's you can see very good, even with my bushnell and tasco scopes I can bust hog in the head from a 100 yds out under the feeder and lights.
the pic doesnt seem to show up so heres a link to one similiar to mine. Like I said they have them at any lowes or home depot .
http://cgi.ebay.com/NEW-SOLAR-SPOT-LIGHT-w-LED-BULBS-Driveways-Landscape_W0QQitemZ280264930221QQcmdZViewItem?hash =item280264930221&_trkparms=72%3A1163%7C39%3A1 %7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3286 .c0.m14