Don't forget color temperature and ballast quality
GigAir:
I tried negotiating the learning curve on hangar lighting 18 months ago.
I eventually had JonJay spec and provide the lights for the hangar I finished building last year here on Dietz Airpark in Canby, Oregon. He has software that tells you just how many footcandles you will have at each location with different lamps, fixtures and configurations in your hangar's dimensions.
Note that footcandles is not the only consideration you should consider. Quiet, quality, ballasts that come on instantly in the cold are a must. Different flourescent lamps produce different color temperatures. Ceiling height and colors of walls, ceiling and floor are also a consideration. I eventually went with T8, 3500K lamps, but I only have 12' ceilings. I also had them wired so I can switch on every other fixture. I am very happy with the lights and configuration.
You are going to be living with the lights for a long time, so I suggest you get professional help in selecting your light fixtures and lamps. I am sure glad I did.
Also, if you haven't sheeted your hangar door yet, you might want to consider sheeting all or some of it with three wall translucent polycarbonate sheeting. It has an R3 insulation factor, and lets in lots of ambient light. I don't need to turn on my lights when loading, pre-flighting, or fetching something from the hangar during the day.
You are welcome to fly down and check out my lights and door.