In electrical terms you could say that a light source would be called a light emitter. However, my friends and I often refer to light emitters as "dark suckers".....cuz we're nerds like that. Sounds like a name for a device to come save the day and rescue everyone from a darkness takeover. I imagine the darkness being ripped away exposing the world it was hiding in an animation of some kind.
(Random evening thought string)
Created: Apr 23, 2014marcusj2001 Document Media