metal / halogen gas / reduced energy costs / electricity / metal-halide lamps / energy consumption / desired energy savings / chemical constitution / energy management systems / gas pressure / inert gas filling / industrial and commercial energy users / inverse square law / outdoor and industrial applications / sodium-mercury gas mixture / less ultraviolet energy / e.g. color printing inspection / metal halide / lowwattage applications / gas filling / low pressure systems / Energy flow diagram / infrared energy / energy savings / energy / steel / /