Built upon decades of military innovation and service, Meprolight's tritium usage has remained the benchmark by which tritium illuminance has been measured. The Mepro HYPER-BRIGHT family of pistol sights is the standard by which all tritium pistol sights are measured. Meprolight utilizes a specially formulated manufacturing process, giving you an industry-first brightness from broad daylight to no light and everything in between. The Mepro HYPER-BRIGHT fixed Day and Night Sights provide the most reliable illumination day or night. Mepro HYPER-BRIGHT fixed sights feature an extremely bright contrast colored ring for fast, accurate target acquisition in the daytime. Both rear and front tritium sources will appear green during low-light and no-light scenarios, providing the utmost confidence in their ability to make hits when it counts. RSR -