Final answer:
A light can indeed be controlled by a contactor, which is an electrical component designed to switch an electrical power circuit and must be rated for the specific voltage and current of the circuit it controls.
Step-by-step explanation:
Yes, a light can be controlled by a contactor. A contactor is an electrically-controlled switch used for switching an electrical power circuit, similar to a relay except with higher current ratings. One requirement of the contactor for controlling a light would be that it must be rated for the voltage and current of the light circuit it is controlling.
For example, if it's controlling a 120-volt light circuit, then the contactor needs to be capable of handling 120 volts and the current that the light will draw. Contactors are widely used in building lighting systems, industrial and commercial electric lighting. The main function is to repeatedly establish and interrupt an electrical power circuit.