I think I wasted $40 buying new tubes for these 4' light fixtures but this was a very easy 5 minute fix. Are these newer 1" diameter tubes florescent like the older 1½" florescent tubes? I ordered a 9100 lumen light yesterday it will work perfect mounted to the wall at the ceiling directly behind me at the work bench. 55 years ago there were not so many products to choose from. 50 years ago I use to explore the stores, looking at every item, learn what is available, I don't do that anymore. Now days when new products are available I often don't know about it until 5 years later & by then some thing new has replaced it already.