This is my story, and I'm sticking to it:
Blame the Energy Code. I predicted this exact thing when the energy codes first came out a few years ago.
Commercial place: everything on occupancy detectors or timers. Timers limited to 2 hours in 'manual' mode, then return to program.
I bet someone hit the 'bypass' mode tolight up the stadium - you can be sure the SuperBowl is not a 'programmed' event. Two hours later and "CLUNK" as the timer kills the lights. Now we get to wait 20 minuted for the lights to re-strike.
I predicted it would happen during an NBA playoff. Close enough.
