PROGRESSIVE LIME CILM Lime Progressive uses our 92CIL filtration science as a base color curve and infuses our Progressive Technology in a fantastic lens for low light. It provides a rich color lift while maintaining maximum depth of field in low light. The lens excels in the woods as well or even under lights. This is a great compliment to the Progressive “CIL” lens where flat grey light is artificially enhanced. The Lime lens is very balanced in low light where you do not need a perceptive enhancement of light. Meaning a light bulb effect. The top of the lens starts at 75% transmittance while the bottom has a 99% transmittance.