A light switch may not work for many reasons: Loose connection, crossed wires, broken wire, tripped breaker, or it may have just gone bad and gave up. There are a lot of possible reasons. If everything else works but that switch, it could be the switch itself. Start with the simple first.
If the switch is allowing power to pass through, it’s time to check beyond the switch and check the power at the light socket or outlet box before it goes in to the light. If the correct power is there, the light could be bad or have a loose connection in the fixture, bad socket, bad wire, or a bad component.
A Qualified Electrician will figure out the problem relatively quick and get your light working or replaced in no time. Contact us for further assistance.