A lighting ballast has three primary functions: first, establish an electric arc through the lamp; second, limit current through the lamp after ignition; and third, compensate for variations in line voltage and ensure consistent lumen output. Learn the difference between traditional core-and-coil, and newer (and better) electronic ballasts …
Ceramic Metal Halide Lighting Basics
Ceramic Metal Halide is relatively new light source, touted for being compact, efficient, and powerful. CMH is part of the high-intensity discharge (HID) lighting category, which offers the highest efficacy and longest life of any lighting type, and saves up to 90% of lighting energy when they replace incandescent lamps.