I used surface-mount light sockets (yes, purchased at Home Depot, $3) and mounted them by bolting them to 3" "L" brackets (also from Home Depot, $3 for a pair). Placing a "Y" splitter in each socket allowed me to have 2 CFLs per socket.

Then I just wired them up in sequence & stuck a cord on the end, and plugged it in.

Here are some pics: