A projection system comprising a light source is disclosed, wherein the light source comprises at least two light emitters arranged to be optically positionable alternately in a first position and a second position by an optical positioning means wherein said optical positioning means is arranged to change the light emission from said light emitters to a preferred optical path being said first position, a power source arranged to empower said light emitters, wherein the light emitter optically positioned in said first position is empowered by said power source and the light emitter optically positioned in said second position is not empowered.

 
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