Olight Diffuser/Filter for FM20 series Different size used for T series and M20 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. The filter is also useful for close range, non-tactical applications – such as map reading — as it reduces the intensity of light output. Diffuser converts the focused high-output beam of a Olight flashlight to a softly diffused wide-angle beam for close-up applications.
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