hmm, as far as mounting hooks to the ceiling. The light fixtures aren't that heavy, do you need to find the beams in the ceiling or will the sheetrock hold fine?
Most of the "coral life power thing fixture" google search websites never seemed to have anything that wasn't 24 or 36. At this point tho I'm considering just going budget and getting normal fluorescent lights and hang them, or make a scaphel thing to screw into the back of the desk it;s on.
I did add some studs on the attic side of my ceiling to anchor the hooks to, but the light fixture I used is very large 72" long by about 12" wide, by like 6" tall.
For a smaller lighter fixture that probably wouldn't be necessary, they make ceiling hooks that have wings that expand on the other side of the hole to give them extra grip.