Most night sights ask you to choose between a tritium-illuminated sight picture in darkness and a fiber optic sight picture in daylight - two different technologies that each excel in different lighting conditions but fall short in the other. The Trijicon DI Night Sights eliminate that compromise entirely with dual illumination technology that combines both tritium and fiber optics in a single sight system that delivers outstanding visibility and brightness across every lighting condition from broad daylight to complete darkness.
Dual Illumination Technology That Works in Any Light
The Trijicon DI Night Sights system runs a fiber optic collector that gathers and amplifies available ambient light during daylight hours - producing the bright, vivid aiming point that fiber optic sights are known for in well-lit conditions. When ambient light drops below the level that fiber optics can effectively collect, the tritium lamp capped with a sapphire jewel takes over — providing self-luminous illumination in complete darkness without any batteries or electronics required. The sapphire cap evenly distributes and amplifies the tritium light output, delivering a clear and highly visible aiming point that transitions naturally between daylight and low-light conditions without any adjustment from the shooter.
User-Replaceable Fiber for Personalized Color
One of the most distinctive features of the fiber optic sights DI system is the user-replaceable fiber optic. The threaded retainer cap allows the shooter to swap out the fiber themselves without gunsmithing - and replacement fibers come in green, amber, orange, and red. That color customization lets shooters dial in the sight picture that works best for their specific vision, shooting style, and application. The Tritium front sight color choice is a personal preference decision, and the DI system gives you the flexibility to make it.
Chemical and Heat Resistant Fiber
The Trijicon Tritium night sights DI fiber optic is chemical and heat resistant - built to handle the solvent exposure and temperature extremes that pistol cleaning and field use regularly produce without degrading the fiber's light collection performance or physical integrity over time.
Compatible With Popular Pistol Platforms
The Trijicon Glock 19 night sights DI configuration and other platform-specific options cover the most widely carried defensive and duty pistols - giving Trijicon pistol optics DI sight buyers the same precise fitment that all Trijicon sight sets deliver for the specific platforms they were designed for.
