I didn't make it!
I need to know if there is an option in Jedi Knights editor that will allow you to view what the lighting looks like without going into the game.
If you know please tell me.
I don't believe so.. lighting needs to be calculated by Radiant (the compiling process) which is very lengthy.. you can try the "fastvis" compile option.. it does things quicker, however it's not very "efficient" and will not truly tell you how certain things will work. It will give you a basic idea though of how stuff looks/works.