Installing any kind of light switch where no wiring is already present is difficult to do on your own and expensive if you pay an electrician to do the work. If you're looking to control Philips Hue smart lighting, you might find Senic's Friends of Hue Outdoor Smart Switch to be pricey at $79, but you can install it yourself in less time than it takes to fetch a screwdriver. The secret behind the easy installation is that the Friends of Hue Outdoor doesn't connect to your home's electrical wiring--it doesn't even rely on batteries. Instead, the switch harvests the kinetic energy generated by pressing one of the switch's four buttons (one at the top and one at the bottom of each paddle). This generates enough energy to send a radio signal to a second-generation Philips Hue Bridge, using the Bridge's Zigbee mesh network.