I am looking to wall mount some T5 HO raintite florescent fixtures horizontally. There is no way to install overhead lighting due to garage doors that open to within 4" of the ceiling. Any thoughts on the mounting height that would provide for the optimum performance? Fixtures are 4' and I wanted to use 3 of them per wall over a 23' distance.(Will be installing on 2 walls, room width is 12'. I'm looking to get about 100foot candles. The overall size of the room is 400 sq ft. Thanks much, any help appreciated.