What is "light unit"

Usage examples of "light unit".

The air supply was a light unit worn on the back that silently extracted air from the water and fed it to the diver, and was limited only by its power supply, which was good for about fifty years.

Entering his room he pulled the black light unit out of a cupboard and set it up, then he turned off the overhead light and turned on the lamp.

Shift the length of duration of a light unit two seconds either way-it doesnt sleep.

Shift the length of duration of a light unit two seconds either way-it doesn’.

Beneath the light unit, a motor hummed and heavily greased cables slid around a spinning flywheel.

Rick followed, not bothering with the dark-light unit because the glow in the water was enough for a beacon.

Shift the length of duration of a light unit two seconds either way - it doesn't sleep.