The answer to 'how to install dimmer switch' is to replace your existing light switch with a dimmer switch. This will allow you to adjust the brightness of your lights to set the perfect mood or save energy. Here are the steps to install a dimmer switch:
First, turn off the power to the light switch at your home's circuit breaker. Use a voltage tester to confirm the power is off. Then, remove the existing switch by unscrewing it from the electrical box. Disconnect the wires, taking note of where each one is connected. Install the new dimmer switch by connecting the wires in the same configuration - the hot (black) wire to the dimmer switch, the neutral (white) wire, and the ground (green or bare copper) wire. Secure the dimmer switch in the electrical box and put the cover plate back on. Turn the power back on at the circuit breaker and test the dimmer to ensure it is working properly.