Olight Diffuser/Filter for FM30 series Red Filter produces a smooth beam of red light that will not degrade night vision as white light would. Hunters use the red filter to avoid spooking game during predawn hours – deer see poorly in the red color spectrum. Blue Filter produces a smooth beam of blue light. Hunters use the blue filter to track wounded game at night because blood stands out more distinctly against foliage when viewed under blue light. The filter is also useful for close range, non-tactical applications – such as map reading — as it reduces the intensity of light output.
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