Lutron Aurora Smart Bulb Dimmer

Fixes the oldest smart bulb problem: someone flicks the wall switch off and the bulbs stop answering. The Aurora's bracket fits over an existing toggle switch, holds it on and turns it into a rotary dimmer for Philips Hue bulbs, with no wiring. It runs on a coin cell that Lutron rates at about three years. It only works on toggle-style switches, so it suits most US flats and few British ones, and it is built around Hue. It controls up to 12 bulbs on its own, or joins a Hue Bridge for a bigger setup.