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How can an LED be distinguished as a high-efficacy luminaire in California?

  1. It meets specific energy conservation dimensions

  2. It is energy-star rated

  3. It must be certified

  4. It has adjustable light intensity

The correct answer is: It must be certified

An LED can be distinguished as a high-efficacy luminaire in California primarily through certification. This certification typically comes from recognized entities that evaluate the energy efficiency and performance of lighting products. In California, meeting the prescribed standards and obtaining certification indicates that the LED luminaire is designed to deliver quality lighting while utilizing energy efficiently, aligning with state energy conservation goals. The other choices relate to various aspects of lighting and energy efficiency, but do not specifically denote the certification process that validates an LED as a high-efficacy luminaire. While energy ratings, energy conservation dimensions, and adjustable intensity play roles in overall luminaire performance and energy savings, they do not alone signify the formal certification needed to classify an LED as high-efficacy in accordance with California regulations.