If there is a suspended ceiling in the operation room, you can use lifting lamps. First, the appearance is uniform and beautiful. Second, dust and oil fume can be prevented from entering the lamps. Now lamps generally have a cover, so you don't have to worry about dust prevention. As for waterproofing, if it is hoisted, it should be about the same height as the ceiling, and there should be no water spraying on the ceiling. Generally, range hoods also have their own lamps that are waterproof and smoke-proof. These are complete sets of equipment and need not be considered separately.