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Discoloured Lens


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I have a pair of EVL Pro Spot 250 heads with fairly new MSD-205/2 lamps. The lamps are properly aligned but I noticed that one was slightly down on output and had a slightly lower colour temperature than the other. I had a look inside and on the one that is down on output one if the lenses inside has a slight yellow tint to it. All the rest are crystal clear as are all of the lenses in the other head.


These units have only done around 200 hours from new so I don't think this just a dirt build up as surley this would have affected the other lenses too? Any idea if this has been done on purpose or if the lens has discoloured for some reason ?


The head has a condenser optical system and it is the second lens in to the fixture after the lamp.



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