A must-have for anyone making critical plant health and harvest decisions, the Method Seven Resistance HPS deliver "Perfect Color" for the world's ultimate grow experience in the intense yellow spectrum and harsh conditions of high pressure sodium (HPS) lighting. The key to its superior performance and protection lies in its real glass lenses. Lenses are formulated with Method Seven signature color technology and manufactured using the highest-quality German mineral glass for unparalleled color, clarity and protection. Other standout features include infrared radiation (heat) absorption, elimination of the strobe effect produced by HPS lights and superior scratch-resistance. Microfiber pouch and hard case included for proper cleaning and storage. 100% UV protection.