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CLTC developed the High-Efficacy Residential Lighting guide to provide information about lighting products and key lighting principles and best practice recommendations. The guide is designed to help builders and lighting industry professionals working on zero-net energy (ZNE) and sustainable residential projects. Lighting designs consisting of high-efficacy luminaires and lamps currently exceed California's energy code requirements. Such designs are increasingly attractive to home buyers as demand grows for energy-efficient smart homes and ZNE residences.