Im sorry Zac, but I don't understand what you're trying to say here. You earlier said that luminaries don't necessarily follow inverse square law. I do understand the inverse square law, parabola and the parabolic reflector. But I don't see why luminaries don't necessarily follow inverse square law as you mentioned in your first comment.
It'd be easier if you could say which light fixture in specific you have in your mind, that doesn't follow the law except for a laser?