Radio frequency (RF) controlled lamp with dimmer compatibility

A radio frequency (RF) controlled lighting unit suitable for connection to at least one of a dimmer configured to adjust a phase cut angle of an input mains voltage from mains in accordance with an adjustable dimming level or an electronic switch configured to provide selection between an on-state and an off-state, the lighting unit comprising:

• a solid state light source;
• a radio circuit configured to receive a wireless control signal, enabling control of the lighting unit;
• a rectifier circuit configured to rectify the input mains voltage received from the dimmer or the electronic switch;
• a first power converter configured to drive the solid state light source in response to the rectified input mains voltage and to deliver power to the radio circuit;
• and
• a second power convertor configured to deliver power to the radio circuit when the rectified input mains voltage becomes inadequate for the first power converter due to the phase-cut angle of the rectified input mains voltage or the off-state of the electronic switch,
• wherein the second power convertor is connected in parallel with the first power converter.