An illumination device comprising: • a number of light sources generating light; and • a number of optical light mixers (707a-g) adapted to collect said generated light and to convert said collected light into a number of homogenized and uniform light beams (751a-g), said light beams propagate along an optical axis; said light sources are arranged in a first group of light sources and in a second group of light sources, where said first and second group of light sources emit light having different spectral distribution, wherein said number of light sources and said optical light mixers (707a-g) are displaceable in relation to each other and can be positioned and fixed in a number of mixing positions, wherein said number of mixing positions said optical light mixers are adapted to collect at least a part of said light emitted by said first group of light sources and at least a part of said light emitted by said second group of light sources and to convert said collected light into number of mixed light beams, wherein said light sources comprise a number of pumping light sources characterized in that the number of pumping light sources are adapted to illuminate a number of light converting materials with pumping light; wherein the converting materials are adapted to convert the pumping light into light having different wavelengths; and wherein said light converting materials are arranged on a converting plate in: • at least a first group of converting areas having a first converting material, where said first group of converting areas constitute said first group of light sources and said first converting material being adapted to convert said pumping light into first converted light; and • at least a second group of converting areas having a second converting material, where said second group of converting areas constitute said second group of light sources and said second converting material being adapted to convert said pumping light into second converted light, wherein each optical light mixer is configured to mix light from the first converted light and the second converted light, wherein said optical light mixers (707a-g) are formed of a solid transparent material, where light enters said optical light mixer through an entrance surface and is reflected through said body to an exit surface where said light exits said optical light mixer. • a number of light sources generating light; and • a number of optical light mixers (707a-g) adapted to collect said generated light and to convert said collected light into a number of homogenized and uniform light beams (751a-g), said light beams propagate along an optical axis; • at least a first group of converting areas having a first converting material, where said first group of converting areas constitute said first group of light sources and said first converting material being adapted to convert said pumping light into first converted light; and • at least a second group of converting areas having a second converting material, where said second group of converting areas constitute said second group of light sources and said second converting material being adapted to convert said pumping light into second converted light, wherein each optical light mixer is configured to mix light from the first converted light and the second converted light, wherein said optical light mixers (707a-g) are formed of a solid transparent material, where light enters said optical light mixer through an entrance surface and is reflected through said body to an exit surface where said light exits said optical light mixer.