Hi all. First post and jumping in two feet first, (I have no idea if I'm doing this correctly.) I'm trying to figure how much to bid out labor to relamp 4' fluorescent bulbs with led replacements. Led bulbs provided, no disposal necessary, assuming no repairs needed. accessible with 6-10' ladder. 500 bulbs or so. I'm having a difficult time figuring how many I can change out in an hour. If I knew, I could formulate an estimate on my hourly rate. I usually do ballast and bulbs together and at a much smaller scale so have no idea. Thoughts?