Enhance the already powerful white light on your Streamlight Flashlight with a colored flip lens. Blue allows you to track that blood trail a little better. Infrared allows you to see objects more clearly and defined while using your light in the dark. Red helps you retain your night vision while decreasing your chances of spooking any animals. Green allows you to catch the eye of your hunting partner without notifying the game you're there to hunt. These flip lenses make a great addition to the Streamlight flashlights and add unique value. FeaturesFits Streamlight Poly Tac, Poly Tac LED, TRL-1 Series, TLR-2 SeriesGreen is usually used to preserve night vision and not alert game animalsBlue is used for various automotive and industrial applicationsRed is often used for signalingIR is only visible when combined with night vision