A flicker-free method and a control circuit is used in conjunction with a conventional AC dimmer coupled to a main-AC supply to continuously control an intensity of a Light Emitting Diode (LED) over substantially a full range of the dimmer. The control circuit has a controllable source of DC voltage that is configured for coupling to at least one LED and that is powered independently of an output of the AC dimmer thereby isolating the LED voltage from the output of the AC dimmer; and a controller coupled to the source of DC voltage. The controller is powered independently of the output of the AC dimmer and is responsive to a firing angle of the AC dimmer for varying a level of the DC voltage as a function of said firing angle.