I'm trying to do a load calculation for a automotive body repair garage.What is the general lighting load(VA per Sq Ft)I should use for calculating the general lighting load?

Also should I take the largest motor in the place and multiply by 125% and add all other loads within the garage to compute the load for the garage?

The body shop has a spray booth, an air compressor with two 5 horsepower motors, and a welder.

Thanks

shortcircuit