30 x 50 metal building. I used 16 lights with these bulbs:
FC65-FEIIIS50K 65 Watt - CFL - 275 W Equal - 5000K Full Spectrum - 80 CRI - 62 Lumens per Watt - 15 Month Warranty - Energy Miser FE-IIIS-65W-50K
Really impressed with the low electrical usage of these bulbs. Day or night, they light it up bright enough I don't need my glasses to read.
Ran two circuits, front half of the building on one and the back half of the building on the other. Separate circuit for outside security lights, 70 w sodium vapor lights, one front and one back.
Ran a total of 14 outlets, 7 on each circuit, front and back again. Used MC cable throughout.