Trijicon recommends green dots because they are the
brightest lamps. They are best for targets in low- and no-light
shooting conditions.

However, because some shooters prefer greater distinction between
their front and rear sights, Trijicon also offers yellow and orange
dots for rear sights. Yellow is recommended over orange for the
rear dots because yellow is brighter, lasts longer, and therefore
carries a longer warranty.

Trijicon's night sight sets are designed and assembled with the
optimum combination of strength and safety. The patented aluminum
cylinder and sapphire lens construction cannot be equaled. The
brightness obtained from the tritium content is focused through the
sapphire lens to give the maximum possible illumination. Because the
sight blades are machined from steel rather than cast, their
strength is unsurpassed. Trijicon night sights are the brightest,
strongest and safest.