Olight T Series Green Filter T Series Flashlight Filter, Green Changes color of light beam to green; used in hunting so as not to alert game Uses a high quality TPU body construction that offers flexibility and durability, as well as chemical and abrasion resistance Attaches to the tailcap of all T-series lights to make a stable base Illuminates contour lines on a map better than red light; green provides the brightest light of the filter options Includes lanyard loop for portable convenience