Lighting affects everything light falls upon. How you see what you see, how you feel
about it, and how you hear what you are hearing. Replace the 'a' with an 'e' and you get lighting effects!
The most successful and brilliant work a lighting designer can do is usually the least noticeable.
Light is quite tactile to me. It has shape and dimension.
I like to think of myself as some of the Scotch tape that holds things together - I'm very handy to have around. But all that actors really need is a bare stage. Lighting is just one of the luxuries of the theater.