A multifunction electronic power supply for LED lighting appliances. A series of interface ports or connectors, a block for filtering and measuring the voltage and current, connected to the main power supply, an auxiliary power supply, a microcontroller, a flyback converter with isolated output, a circuit for measuring the brightness, a light sensor, which detects the light reflected from the floor and from the objects and/or people present in the area which is illuminated by the lighting appliance, and a LED light source of the lighting appliance, which spreads light in the environment and which is driven by the electronic power supply.