Are you quoting similar steel buildings? Around here you can get an Eagle Carport building for half the price of an I-beam building. Garage doors and man doors are trailer park quality, but it's storage.
I'm having a 40x50 I-beam being built now. $22k for the building only, insulated, no bay...
I bought some random Chinese LED flood lights off Amazon that have slowly gotten dimmer over the last 9 months or so. Still fairly bright but definitely diminishing.
I say that as it seems like everything else from the random brands... Sub-par performance at a price you can't complain about...