XS Sight Systems Revolver Brass Bread Tritium Pistol Sight Colt Viper Front Black Green Green. The sights use a proprietary photoluminescent Glow Dot that absorbs ambient light and glows in low light. The convex dot's additional surface area increases light absorption intensifying the charge of the Glow Dot. Designed to be large and highly visible these sights help solve many issues from aging eyes to deteriorating vision. We've found that green is an excellent option for low light and has a very bright glow intensity. Orange is excellent for bright lighting conditions has a very good glow and works well in low light. White is highly reflective and provides a great bright or low light option. XS Tritium Night sights are big bright and easy to see day or night Upgrade your J frame sights today to the fastest sights in any light. Specifications for XS Sight Systems Revolver Brass Bread Tritium Pistol Sight: Manufacturer: XS Sight Systems Color: Black Rear Sight Color: Black Fabric/Material: Steel Tritium Gun Type: Revolver Illumination Type: Tritium Features of XS Sight Systems Revolver Brass Bread Tritium Pistol Sight White dot reflects ambient light Tritium lamp for low light/no light visibility Easy DIY installation Precision CNC machined sight Package Contents: XS Sight Systems Revolver Brass Bread Tritium Pistol Sight XS Sight Systems CM-RV001S-4G: Revolver Brass Bread Tritium Pistol Sight Colt Viper Front Black Green Green