A controllable light bulb comprises an electrical connector, a receiver module, an electronic switch, a translucent casing, and a light producing element. The electrical connector receives a power signal. The receiver module is powered by the power signal received via the electrical connector and determines control parameters based upon on/off modulation of the power signal. The receiver module generates a control signal based upon the control parameters while the power signal is on. The electronic switch outputs an output power signal and reduces the output power signal based on the control signal. The translucent casing encloses the light producing element. The light producing element receives the output power signal.