The Playbulb Adapter allows users to conveniently control light bulbs via smartphone. The adapter is simply screwed into any E26 or E27 conventional light bulb socket. Via a Bluetooth 4.0 platform, any number of light bulbs can be switched on and off via an iOS or Android app. In addition, a timer can be programmed and the brightness can be controlled. Optionally, all light bulbs can be set to energy-saving mode if required.