T21 Low Pressure Sodium Sox Lamp

Product Review

T21 Low Pressure Sodium Sox Lamp Features: T21 Bulb Type BY22d Base Clear Finish 16000 Average Rated Hours 13500-30000 Lumens Operating Position: Horizontal ± 20deg; 90W, 135W or 180W HID (High Intensity Discharge) Basics: The operational concept of HID lamps are very similar to fluorescent lamps. HID lamps include Mercury Vapor, Metal Halide, High Pressure Sodium/Low Pressure Sodium (SOX). In an HID lamp, the electrical arc, gasses and metals are contained in the arc tube. Like fluorescents, HID lamps require a ballast to control the electrical current in the arc tube. HID lamps need a start-up time to reach their full brightness. This usually takes 5 to 10 minutes. High Pressure Sodium/Low Pressure Sodium (SOX): Incorporates solid sodium, mercury and xenon or a neon/argon gas mixture Boasts a luminous efficiency that is much greater than its mercury vapor or metal halide