I've heard about Local Lighting, never got around to messing with it. How does it work?
Oh If you mean 'how to make a light visible for a player only', just place it in its own Camera
You need to use the .Changed event on Lighting
Lighting.Changed:connect(function() --- set the lighting properties for the player in a localscript end)
That will fire a lot per second, but it works :)
Crazyman32 has made a respectable script of this public. Here it is: http://www.roblox.com/Localized-Lighting-item?id=103185990
I believe with the use of .FilteringEnabled you have the ability to have local lighting along with anything else.
Workspace.FilteringEnabled = true;
Place it in the camera.