It sounds like something that should seriously be taken into consideration in the planning stage. I can see the point. I would probably opt to use them in pairs (one at each end of the hallway or stairway level)or in combination with Exit lighting signs. If the lighting head that points down a hallway goes out there is still some illumination coming from the lighted exit sign. I am reading this because it says "total darkness" that sounds like if there is any light at all coming from a second source that it would be ok by code. Technically speaking if there are any reflective surfaces around to bounce some light back, one head would be giving light both ways to varying degrees. I can definitely see the point about the one head in the bathroom and would not allow that anymore. (Just my opinions) [Linked Image]

Bill

Bill