Highest Grade Strontium Aluminate Pigments (grade 0, Brightness Rating 33000 mcd/m2) in extremely high concentration * Thick high adhesion paste in special applicator designed for applying night sight beads to guns, rifles, and other firearms. * Brightest phosphorescent night sight available using Glow Inc. technology * Apply bead between 1/16" - 1/8" thick for optimal performance directly from syringe * Glows throughout the night after a 10 minute charge from bright light or direct sunlight