There are sillier lights out there - figure like 14,000 lumens spring to mind. Runtimes measured till the light melts are not unknown. Never did understand the crazy bright incandescent devices. Here's a CPF thread on seriously insane bulbs. The Osram 64656 bulb when overdriven can give over 15,000 lumens. For a short time.
The 64657 bulb - nominally 250W can produce even more light. I believe it was one of those bulbs in the TK Monster device that so memorably went boom. Probably about 12,000 lumens out the front till it tried to demolish an apartment. And five minutes of runtime. And $550.