Yes, I know... E27 1000W bulbs of similar size have indeed existed. However, unlike a $3 5x8 cm 50W mains COB LED module, you cannot mount one in the intended space in common fridges.

BTW, a little story regarding a 500W one: A Czechoslovak photographer needed one but like most heavy equipment in the Eastern bloc, they were never sold to individuals. He visited the factory for an alleged newspaper photoshoot and teamed up with my grandpa and other workers, who hung his desired bulb on his equipment backpack and pretended to sneakily follow him to the gatehouse. They laughed quietly, pointing at the bulb and thus socially engineering the doorman to enjoy the moment and forgo the usual pat-down. Officially, they just told anyone that the bulb had been a dud, which could not have been disproven.