Is some kind of formula for lighting in a storage area. I doing a 60 x 90 cold storage barn and its just a couple of circuits for receptacles and circuit for the lights. Not sure how I should light this. Not even sure what will be in it. I do know their trucks will be in there and they will probably do maintenance on them. I can't get a straight answer when I ask them how much light they need. Their old place was dungeon.