Patent ID: 8405313

Claim:
An LED lamp, comprising: a first LED string providing a first color temperature; a second LED string connected in parallel with the first LED string, the second LED string providing a second color temperature difference from the first color temperature; a variable resistor connected in series with one of the first and second LED strings, the variable resistor comprising a resistance track with resistance coils wound thereon and a slider moveable along the resistance track; and a heat sink thermally connecting the first and second LED strings; wherein when a position of the slider of the variable resistor is changed, an electric current flowing through the one of the first and second LED strings is changed accordingly to adjust the color temperature of the LED lamp; and wherein an elongated cutout is defined in the heat sink with an adjustment button received therein, and the adjustment button is slideable along the elongated cutout to thereby change the position of the slider of the variable resistor.