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The Illuminating Engineering Society of North America (IES) recently unveiled "American National Standard Practice for Office Lighting (ANSI/IES RP-1-12)," the latest in a continuing series of IES Recommended Practices for lighting practitioners. Approved by the American National Standards Institute as an American National Standard, ANSI/IES RP-1-12 has been substantially revised and reorganized from earlier editions to address recent changes in the office environment, such as computer-based tasks, new office layouts, the effect of energy efficiency on lighting design, new light sources, and control techniques.