The power supply (120) for LEDs provides power to a LED light source (110) having a variable number of LEDs wired in series and/or in parallel. The power supply (120) uses current and voltage feedback to adjust power to the LEDs and provides protection to the LED light source (110). A feedback controller (125) compares sensed current and sensed voltage to a reference signal and generates a feedback signal, which is processed by a power factor corrector (124) to adjust the current flow through the transformer supplying current to the LEDs. A LED control switch (127) clamps a peak of the current to the LEDs to provide further protection to the LED light source (110). A short/open detection circuit (130) indicates any detection of a "LED outage" of the LED light source (110).
