The answer to 'light fixture dimming lights' is that there are several common causes, including a problem with the dimmer switch, incompatible bulbs, or loose wiring connections. Symptoms may include the lights flickering, buzzing, or not dimming properly. Solutions can range from replacing the dimmer switch to rewiring the fixture, depending on the specific issue.
If the problem is with the dimmer switch, you may be able to replace it yourself if you're comfortable working with electrical wiring. However, if the issue is with the fixture itself or you're unsure of the cause, it's best to call a licensed electrician to diagnose and fix the problem safely.