An LED lighting device includes at least two luminescent devices, two current sensing elements, and two current regulators. The first and second luminescent device are driven by a rectified AC voltage for providing light according to first current and second current, respectively. The first current sensing element provides a first feedback voltage associated with the first current and the second current sensing element provides a second feedback voltage associated with the second current. The first current regulator provides a first regulating current setting according to the first feedback voltage and a line voltage detection voltage associated with the rectified AC voltage, wherein the waveform of the first regulating current setting follows the waveform of the rectified AC voltage. The second current controller is coupled in parallel to the second luminescent device and provides a constant second regulating current setting according to the second feedback voltage.