So today I picked up my 2nd 4-ft 4-bulb T5HO fixture.
Below is the rack I currently have with 1 rack of plants and 1 rack of seeds, most of which can be consolidated now. Early on, one of the rollers on the rack broke off, so I have it propped to the proper height with a piece of wood. If I do add the second fixture, I'll for sure just take off the other 3 coasters so it is well balanced. Do you think it is safe to add the weight of a second light to the rack? Just don't want to come home to a collapsed rack!