The target is illuminated by a metal-halide lamp that emits UV-VIS light. I have a Rosco Filter transmitting a yellow and UV visual target. When I apply a single 0.15 ND filter the overall intensity of the visual target drops considerably, causing less light to pass through the filter. When 2 (0.15) ND filters were applied even more light was blocked. In both instances, the yellow and UV  portions are magnified in comparison to the other light allowed to pass through. Does that mean that the Yellow and UV light is more saturated?  

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