Yellow to White: Ceramic Discharge Metal Halide Retrofit Lamps

Abstract

A new breed of high-pressure sodium retrofit lamps has evolved utilizing the best of high-pressure sodium and metal halide technologies. These medium wattage ceramic discharge metal halide lamps have brought color and clarity to formerly dreary HPS industrial installations. A comparison of the two lamp technologies, with the intent of addressing both the similarities and differences, is presented. This comparison focuses on some of the physical, electrical, and photometric aspects of these two different, and yet similar, lamp types.

Keywords:

• High pressure sodium lamp
• metal halide lamp
• retrofit
• lamp characteristics