We have 5 x 8ft. T-12 dual tube fixtures in the workshop. They hang at about 16ft. above floor so are a big PIA to replace tubes. I would like to replace with LEDS fixtures but, have yet to find any 8 ft. units to have a direct replacement. Can the 4ft. ones from COSTCO be mechanically connected together to create an 8 ft. fixture?
I bought a used rolling warehouse ladder, like the ones in the aisles at Home Depot, specifically for working on shop lights. I roll it up onto my 6' x 12' utility trailer, for extra height, and run tie down ratchet straps to all four corners for added stability.