Patent ID: 8004211

Claim:
A LED lighting device comprising at least a first and a second LED supplied by a switched mode power supply, wherein the current through the first LED is controlled by a first bypass switch, connected in parallel with the first LED, the current through the second LED is controlled by a second bypass switch, connected in parallel with the second LED, the first and second LEDs being connected in series between the switched mode power supply and a first constant current source, and wherein the switched mode power supply is arranged to supply a number of different output voltages depending on the state of the first and second bypass switches, such that the voltage depends on the number of LEDs emitting light; wherein the first and second LEDs emit light of a green and blue color, respectively, and are connected to the first constant current source via a third LED, which is controlled by a third bypass switch, wherein the first and second LEDs are connected to a second constant current source via a fourth LED, which is controlled by a fourth bypass switch, and wherein the third and fourth LEDs emit red or amber-colored light.