Abstract: A light emitting diode (LED) lamp. Brightness of the LED lamp is controlled by a dimmer and an external alternating current (AC) source is received via the dimmer. The LED lamp includes at least one LED, a rectifying-modulating-driving apparatus and a current holding compensator. The rectifying-modulating-driving apparatus is coupled between the LED and the dimmer for bridge-rectifying and modulating an AC source with a conducting angle from the dimmer to drive the LED. The current holding compensator is coupled to the rectifying-modulating-driving apparatus to provide a compensation current when the AC source with the conducting angle is lower than a voltage after being bridge-rectified.