Hi Tarpals!
I just wired up my first homemade hood/canopy. I must say that it was really easy. A friend gave me some ballasts, I bought the sockets and bulbs, built the wood top (with nothing but a circular saw and drill) and wired it. I've wired other things before (like a ceiling fan and lightswitches), but this was my first foray into fluorescents. It really, really isn't hard if you know how to use tools at all.
If you want to use non-compact fluorescent bulbs (which have a wider range of colors), you can go to the store and buy a cheap light kit, like one for under a kitchen cabinet. Then you can either put it into a home-made hood as-is, or you can take it apart and put the ballast and sockets into your hood by themselves. This is a good option if you want to cram more lights into the hood than would fit with the original fixture (like I do - I put 4 bulbs in mine).
I've learned that there is nothing mysterious nor really complicated about fluorescent lights. I hate the way anything with the word "Aquarium" on it costs a fortune, and I've started making my own stuff. I just yesterday built a sump filter using a trash can, pot for pond plants (with the little holes all over), and batting for quilts as the filter media. I bought hoses (bilge pump hoses bend quite nicely) and fixtures for the water at Lowe's - some are fixtures for outside sprinkler systems. The only "aquarium" thing I bought was the pump. I think I spent about $30 on this setup, and a commercial "wet-dry" filter can cost about $300. I have mine set up so that it isn't wet-dry (the filter media is below the water surface in the sump, so it doesn't trickle), but I can change it back and forth if I want by raising the pot.
Anyway, I know this isn't what you were asking about, I think I'm just proud of myself. But look at forums that have DIY sections and lighting sections, and you can figure out how to do a lot of this yourself at lower cost. A site I like is
www.plantedtank.net - they have good DIY and lighting forums.
Good luck!
-Laura