New 20 x 40 garage, need lighting advice

[myfast70]

The new garage came already with 6 4' twin bulb's. They are two rows of three going in the 40' direction. I would like to swap them ou for something that will brighten up the garage even more. I was thinking about switching the out to the quad buld T8 8' fixtures or a 6 bulb 4' fixture setup that I saw at Home Depot. What do you guys suggest?

The garage is 20 x 40 with 16ft flat ceiling. The garage is finisihed drywall that is painted a flat white. I've also got a 20 x 20 garage that is attached that I was just going to put up two older 8' fixtures up.

 

[Cuda]

I recently replaced about three hundred 400 watt metal halide lamp fixtures with the 4ft 6 lamp t8 fixture. If anything the lighting improved.
My only gripe is about 20% for these fixtures are for wet locations and use two 3 lamp ballasts where the regular ones use a 2 lamp ballast and a 4 lamp ballast.
I wish they would have stayed the same.
I've never dealt with the 8 footers so I couldn't speak on those.

 

[fastbuick]

Take a look at this thread by veno using CFL's for lighting.

http://www.garagejournal.com/forum/showthread.php?t=38658

I used four 26w 100w equivalent CFL's in my last garage which was 22x24 with 8ft ceiling which was ok but not great.
I think veno's plan is what I'm going to use in my shop 14x23, and 2 car garage with 10ft ceilings. It's on my to do list for this summer.

 

[nehog]

Also see http://www.garagejournal.com/forum/showthread.php?p=929394#post929394 for ideas. The 16 ft ceiling is fine with the metal halide lights, I'd go with six of them (two rows of three).