Is the lighting in the elevator room the responsibility of the elevator company or the property?

Under normal circumstances, Party A is responsible for elevator maintenance, only after the lower end of the elevator power supply, and Party A is responsible for the upper end of the power supply. Moreover, the elevator contract also states the work items that Party A needs to cooperate with Party B.. However, some well-connected or large customers also have Party B to bear part of Party A's responsibilities. Make a good impression on customers.