The answer to 'why is my light fixture not working' is that there are several common causes, including a blown fuse or tripped circuit breaker, a faulty light bulb, loose wiring connections, or a problem with the light fixture itself. Symptoms may include the fixture not turning on at all, flickering or intermittent operation, or the fixture feeling hot to the touch.
In many cases, homeowners can troubleshoot and fix a non-working light fixture themselves, but it's important to follow proper safety precautions. If the issue is with the home's electrical system, it's best to call a licensed electrician to diagnose and resolve the problem.