I have a walkin closet that is approx. 10ft by 4ft and am adding a light to it. When you walk in the closet you make an imediate left. On the right is the shelving and on the left is a wall running down the 10ft. I am adding the light in the middle of the closet not above the door. I know the code is 12" away from the shelves for incandecent and 6" away for fluorescent. My question is how far from the wall on the left do I have to be?