This course has been significantly updated since the spring of 2018 in Montana and Washington. Non-energy benefits can be necessary for retrofits, especially high performance fluorescent or existing LED, because energy savings and rebates are often no longer sufficient. Midwest Energy Efficiency Alliance stated that 75% of the benefits of energy efficient projects can be non-energy benefits from lighting and other measures. Non-energy benefits include biophilia, circadian and the new non-circadian parts of Human Centric Lighting, advanced controls, certifications, going green and reduced maintenance. Selecting the best value LED lighting is crucial since they may last a decade or more. Understand TLEDs that operate with existing ballasts, direct line voltage and dedicated drivers. Learn why LED lightbars, fixture kits and new fixtures can often be a better choice. Now not only LED hibays are cost effective to replace MH and HPS ones, but often also T8 and T5HO ones. Several interior and exterior applications will be discussed. Since LED wattages are so low, it is important to know when controls are cost effective saving energy. Register and learn much more regarding retrofits and new construction.