Truglo Tritium Handgun Night Sights - GlockTritium Handgun Day Night Sights Glock For: Glock 17 17L, 19, 22, 23, 24, 26, 27, 33, 34, 35, 38, 39, 45 (Excluding M. O. S. models) High Contrast Orange Green Front Sight Green Rear When the lights go out, your sidearm doesnt need to be left in the dark. TRITIUM night sights transition from standard white dot sights during the daylight, to glowing green dots in the dark. Tritium does not need batteries and does not need to be charged with light it