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The EPA has finalized guidance regarding the content and application of lumen maintenance performance data for LED packages, LED arrays and LED modules intended for use in ENERGY STAR qualified solid state lamps and luminaires. Its objective is to facilitate robust testing which builds upon industry best practices and helps maintain confidence in ENERGY STAR qualified lighting products. EPA developed this guidance in consultation with LED package and array manufacturers to ensure it is informed by the latest technological developments with solid state lighting subcomponents. The Agency intends for lumen maintenance testing and reporting to follow this guidance going forward, while providing allowances detailed in the guidance for testing and reporting already completed, as well as testing which is currently underway or in the final planning stages.