This has some really cool potential!
Cop car lights, security cameras, laser pointers, stage lights, active day/night cycle, flashlights, car headlights.
It definitely needs an active ability to turn off/on, but you could simulate that with a front shutter too.
Would really cool if we get caustics and IOR added in, could make a prism that separates the light frequencies out hahaha ok wishful thinking there. Oh reflection too, think laser lights bounding off them!
I love how responsive this is to movement.