I recently got a 75 gallon and decided to try a shop light from Home Depot,
I went down and they had some low end ones for 7 bucks with electronic ballast and a intermediate one for 16 bucks, the 16 dollar one actually has a metal cage on the bottom and fit perfectly on the 75(just looks ugly) with no modification, the grate kept it off the class top slightly.
I checked out the ballast and it was the same as the cheap 7 buck one. I purchased two phillips sunshine t8 bulbs (5000K) and they were really bright and made the tank look great. Now here is the deal, these cheap shop lights had a slight buzzing from them, but you had to be withing a foot or so to hear it. I bought the shop light as a tempory setup until my triple tube strip light arrived from Big Als(the shop light is now in my garage over the work bench
Anyway, I got the All-Glass strip light and it looks great, but I can honestly tell you internally it is pretty much the same as the shop light, it makes the same slight buzzing and the output from the exact same bulbs I had in the shop light is exactly the same, the cheap shop light had no problem driving the bulbs.
The point I am getting at is the shop lights from home depot can be a good choice if you want to take the time to slightly modify them so they look good. If I was to keep it I would have painted it black and removed the pull chain switch with a rocker type or push button one. Also some end caps would need to be made, or you could just pull the guts out and put them in a wood canopy/hood or even a section of rain gutter with end caps.
I really think that the shop light with the sunshine bulbs (5000k) would be able to grow some plants without problems, it was really bright.