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 …
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Commercial photometry is important for lighting installers and their clients in choosing the best locations to install fixtures as well as ensuring maximum efficiency of lighting systems. The science of measuring light, in terms of how the human eye perceives its brightness, is called photometry. …
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