This hotel reflected ceiling plan example shows layout of lighting lamps, light fixtures and smoke detectors/ararms.
"A reflected ceiling plan (RCP) shows a view of the room as if looking from above, through the ceiling, at a mirror installed one foot below the ceiling level, which shows the reflected image of the ceiling above. This convention maintains the same orientation of the floor and ceilings plans - looking down from above. RCPs are used by designers and architects to demonstrate lighting, visible mechanical features, and ceiling forms as part of the documents provided for construction." [Floor plan. Wikipedia]
The RCP sample "Hotel RCP" was designed using ConceptDraw DIAGRAM extended with Reflected Ceiling Plans solution from the Building Plans area of ConceptDraw Solution Park.