A yellow lens cover will widen the output to increase side visibility. It softens the light to make it more comfortable to the eyes and is extra good for rainy or snowy weather. With the lens cover, the beam has 1360 actual lumens in E-mode and 6190 actual lumens in Xperience-mode. The range is 245/473 meters with the flood lens cover. It fits the Siberia X 7Ó (Part No. 270960).