You can't beat Giant CFL's in a garage, for the money
Don't get me wrong, I hate CFL's. These are the ONLY CFL bulbs, I would hit a dog in the arse with. 68 watts in, 300 watt equivalence to an incandescent out. -20F starting, no wob wob noise when it's cold, no hum, made to be used base up. $25 per light including standard porcelain bulb holder, if you don't already have one.
The only drawback to them is, they hang down 10 inches, so you have to mind them, when carrying things, if you have low ceiling height.
Two of these make an average garage look like daylight in there.
I have 10 in my 30x30, with 2 on a switch, so I can have as little or as much light as I want.
There are 400 watt versions now too.
Until LED shop lights get to where they are affordable, these are a good alternative.