I work for a large medical group in a building built with a back-up generator. When our space was built out 20 years ago the powers-that-be decided to not pay the extra money for the conduit and wiring to tie our office lights and outlets in to the back-up generator: "too expensive."
After repeated requests to the powers that be to retrofit the office to the back-up power, since I think it can be argued, that medical offices should be considered "an essential service", fell on deaf ears, I gave up.
One of the requests occurred in the hallway during which conversation THE POWER WENT OUT. I was asked with a smile if I had arranged the outage.
It wasn't until a few thousand dollars of refrigerated/ frozen vaccines were lost due to another power outage that "they" decided to run conduit and wiring, but only to the vaccines refrigerator, not the whole office.