Very Important. Use the the Lutron Low Voltage light switch, HomeDepot doesn't sell, only Lowes. Otherwise, you will hear loud humming sounds from the ballast. We went through 6-8 different light switches until we found the one that doesn't hum! (This applies to all LED lights by the way). You should also know that it's not flush like the photos show. It comes out a couple inches (small square sitting on a larger square). Still gave it 5 stars for the uniqueness.