How Many Angels?

The Boss shouted “LUMEN FIT!” and there was light.
After some flickering the light went out again.
The Boss cursed up a blue streak.
“SCALAE FIT!” shouted The Boss, and a ladder appeared.
Three angels grabbed it and went up to the light.
One went up the ladder to grab it and two more turned the ladder to unscrew it from its socket.
A fourth pulled a spare out of inventory, swapped lights with the other angels, and they screwed the new one in.
The Boss smiled. It was much more efficient than needing six angels and a dinner table.