Hello. I’m a student currently taking up electronics engineering course, we have this electronic design subject and we have proposed an automatic light control system as our design. The system is supposed to be implemented inside rest rooms. I just want to ask, is it true that turning on and turning off lights very often will decrease the life span of light? It would be a great help if you would give me any suggestion/s, comment/s and any related literature/s regarding this matter, it will surely help us in our defense. Thanks a lot.