The answer to 'light fixture not working' is that there are several common causes, including a bad light bulb, a faulty light switch, loose wiring, or a problem with the fixture itself. Symptoms may include the light not turning on at all, flickering, or only partially illuminating. Solutions can range from simply replacing the bulb to more complex electrical troubleshooting and repairs.
If the issue is a bad light bulb or a tripped circuit breaker, those are usually easy DIY fixes. However, if the problem is with the wiring or the light fixture itself, it's best to call in a professional electrical contractor. Attempting electrical work without the proper knowledge and safety precautions can be extremely dangerous.