The answer is: about 4 and a half hours...
The question? How long can we tolerate working in an office in an old brick building on a ninety degree day after the electricity goes off. The power was turned back on about fifteen minutes before I came home. It was rather nice working without the lights on. Quite flattering, too, in a Blanch DuBois sort of way. I was lucky that my office had a window.
The fluorescents burned when they returned. Oh, did they burn. So harsh. So unflattering.
But there is always handwritten paper work to catch up on. And phones to be answered.
And if the power hadn't come back on? I guess that answer would have been as long as it takes.