Re: If you could bring any Star Trek tech to this world... ?
Replicators have to be programmed, though. I thought it was a more complicated process than just scanning something and getting more. If you don't have an original to scan, how would you ever get original things?
In TNG eps(Samartan Snare) The Pakled's "scan" Geordi's phaser in their replicator to make more. Geordi even comments on this fact. So i'm guess as long as you have something to scan and the mem/power/bulk"stuff" you can make as many copies of anything you want.
How many lights do YOU see?