The answer to 'ceiling fan dimming lights' is that the most common causes are issues with the fan's wiring, the dimmer switch, or the light bulbs themselves. Symptoms may include the lights flickering, dimming unevenly, or not dimming at all. Solutions can range from replacing the light bulbs to rewiring the fan or replacing the dimmer switch.
If the issue is with the wiring or dimmer switch, it's best to call a licensed electrician, as working with electrical components can be dangerous for homeowners without the proper training and equipment. However, if the problem is simply with the light bulbs, this is usually a DIY-friendly fix that homeowners can handle themselves.