There are two ways to accomplish smart lighting. The first is to change the physical light bulb with a smart one. Your existing light switch will remain in place and control it. However if your light switch is off then you will not be able to turn the light bulb on with your phone or voice. Some people tape their light switches when choosing this route. The other option is to replace the actual light switch and leave the bulbs as is — or replace them to high efficiency LED bulbs. The choice is yours, but we can recommend an option as well.