<Bonz> Light bulbs are not actually "light bulbs" but dark
absorbers. When you turn them on, they suck the dark out of
the room. You can prove this by holding your hand under a
"light bulb". The dark will stack up under your hand where its
path to the absorber is blocked by your hand. When they quit
working and turn a dark color, it's not because they burnt
out, it's because they're full.
