The answer to 'recessed lighting not working' is that there are several common causes, including a tripped circuit breaker, a burned-out bulb, a faulty light fixture, or an issue with the wiring. Symptoms may include the lights not turning on at all or flickering/dimming. Solutions can range from resetting the breaker, replacing the bulb, or troubleshooting the electrical connections.
If the issue is with the wiring or light fixture itself, it's generally best to call a licensed electrician, as working with electrical systems can be dangerous for untrained homeowners. However, for simple problems like a burned-out bulb, a homeowner can often safely replace it themselves.