How a light works can change also. Sometimes it will fall back on a dumb rotation if the sensors are not working. Also it may make sense to rely on sensors/but

How a light works can change also. Sometimes it will fall back on a dumb rotation if the sensors are not working. Also it may make sense to rely on sensors/buttons when there are few people, but once your city gets too big and has constant foot traffic, fixing the sensors may not be worth it.