Patent ID: 7736017

Claim:
An illumination device emitting light with an average color, comprising a plurality of first light-emitting diodes (LEDs) emitting light with a first color and a plurality of second light-emitting diodes (LEDs) emitting light with a second color, wherein the average color is a superposition of the first and the second color, the first color providing a bluish-white color impression and the second color providing a yellowish-white color impression wherein each of the plurality of first LEDs is characterized by a respective first point in the color space, each respective first point in the color space located on a first side with respect to an average color point, each of the plurality of second LEDs is characterized by a respective second point in the color space, each respective second point in the color space located on a second side with respect to the average color point, the second side is opposite the first side with respect to the average color point, the plurality of the first LEDs has an average first color, the plurality of the second LEDs has an average second color, and the average first color and the average second color, when mixed, are close to or equal to the average color of the illumination device.