The answer to 'switch dimming lights' is that there can be several common causes for issues with switch-controlled dimming lights, including faulty dimmer switches, outdated or incompatible light bulbs, and wiring problems. Symptoms may include flickering, buzzing, or the lights not responding properly to the switch.
To troubleshoot, first check that the dimmer switch is compatible with the type of light bulbs you're using. Older-style incandescent bulbs work best with traditional dimmer switches, while newer LED or CFL bulbs may require a dimmer switch specifically designed for those bulb types. You can also try replacing the dimmer switch itself, as they can wear out over time. If the issue persists, there may be a problem with the wiring that will require the help of a licensed electrician.