Hi
I'm using one of those 18", 15W fluorescent "workshop" lights for my marquee light.  I finally got my marquee artwork last night and I hooked it all up and turned on the light...and was less than impressed.  The lightning looks a bit dim, especially at the ends (my marquee size is roughly 5"x28").  
I took the cover off the fluorescent light and it stills seems a bit dim.  Most of these workshop lights are all 15W.  I could try one of the direct wire ones (and then figure out how to hook that up) which run ~20-30W.  What else are people using?  Anyone hookup one of those direct-wire jobs (3 wires, white/black/green, seems simple enough, but I've never done any electrical work)? 
Thanks in advance for the tips.