Lighting systems are disclosed, including a multi-die LED array; and LED driver electronics, which include voltage regulating electronics which regulate rectified low voltage AC. The voltage regulating electronics include: booster electronics that sense rectified low voltage AC and boost the LVAC to a predetermined voltage for powering the multi-die LED; power factor correcting electronics that sense the AC current and AC voltage in the driver and control the booster electronics to further regulate the voltage, thereby providing power factor correction; and constant current electronics which sense one or both of current and voltage through the driver and control the booster electronics to further regulate the voltage, thereby providing substantially constant current to the multi-die LED array.