The Trijicon 3 Dot Night Sight Sets include front and rear green lights for the brightest lights. They are best for shooting targets in low- and no-light conditions. They are designed and assembled with the optimum combination of strength and safety with a patented aluminum cylinder and sapphire lens construction that cannot be matched. The maximum possible illumination is obtained by the tritium content focused through the sapphire lens. Because the sight blades are machined from steel rather than cast, their strength is unsurpassed. Trijicon Night Sights are the brightest, strongest and safest.