Carpe Noctem

"Lights" do not emit light, they suck dark. The larger the Dark Sucker, the greater its capacity to suck dark. Like most things, they expire; once they are full of dark, they can no longer suck.
Dark has mass. When dark goes into a Dark Sucker, friction from the mass generates heat; it is not wise to touch an operating Dark Sucker.
Dark is heavier than light.
Dark is faster than light.

It is darkness, not light, that is the fundamental radiative transport mechanism of the universe.

Invert(assign a negative value to) the multiplier of an omni light, you get a light sucker.
(Lo! think of the applications!)