Patent ID: 8399900

Claim:
A light emitting device comprising a light emitting diode emitting light in a first emission spectrum, and a composition comprising at least two components and being adapted to absorb at least a part of the light in the first emission spectrum and upon absorption to emit up-converted light in a second emission spectrum, wherein the light in said second emission spectrum has a wavelength range shorter than the wavelength range of the light in the first emission spectrum, and wherein the light emitted by the light emitting device comprises a mixture at least of light in the first emission spectrum and of light in the second emission spectrum, wherein: the composition comprises at least a first component and a second component, the first component is capable of absorbing light in the first emission spectrum and transferring at least a part of the excitation energy to the second component, the second component is capable of receiving excitation energy from a plurality of members of the first component and upon reception of the excitation energy emitting an up-converted light in the second emission spectrum, and the emissive pathway of the first component additionally provides a light in a fourth emission spectrum having a wavelength range different from the wavelength range of the light in the first and second emission spectra.