I'm in the planning stages of renovating a barn to be used as a wedding venue, with receptions to be held in the hay mow of the barn. I'm trying to determine how many light fixtures I will need and I'm wondering if there is some sort of calculation for figuring this out. The ceiling is 28' high in the center. I'm considering using several 3-tier chandeliers that have 28 60 watt bulbs, and are 55" high x 60" wide. I'm just not sure how many I need or how far apart I can space them, or if I'll need to have lights on the side walls, too. The sidewalls are 11.5' high, the barn is 32' wide by 80' long. I'm not sure if this is something I can calculate on my own to get a rough estimate or if I'll need to enlist the help of a professional.
Thanks in advance for any help you can give me!