I am working on project for school. I have a 40 x65 crane bay that needs lighting. How do I know which type of occupancy do I use from table 220.12? Also I am so lost on VA. I want to use t5 high bay fixtures with ten 54w lamps on 120v, but I have no clue how to find the VA ratings for that fixture? Please help. need asap. Here is the fixture spec sheet I want to use, http://www.acuitybrandslighting.com/library/LL/documents/SpecSheets/FGB-HL-T5HO.pdf . Thanks, Jason