I tried to help Mapping community somehow, but after I made this thing, I noticed that someone already made this ( Acegikmo ) . I wanna kill myself right now ;D
So I made pack of example maps. They include all important lighting entities, mainly light_environment. They also include rain particles, snow, rain drops on water and waterfall splashes, etc.. every example map is styled for that environment and has some example of how buildings should look in environment. Also includes 3D Skybox!
I also made Light prefabs (And of course, someone already made Light gallery...)
Here are pictures of example maps, the pack also includes picture instructions.
And version 0.5 of Light prefabs include some basic lights. Wall,floor and ceiling lights. (also includes 1 "street lamp")