Abstract: Systems and methods for inventorying existing products, evaluating the financial, convenience, and environmental impact of installing replacement more energy efficient products, purchasing energy efficient products, and/or assessing actual savings are described. Embodiments of the system are designed to allow a user to provide known and/or easily available information to quickly assess the attractiveness of changing to energy efficient products, prioritize potential purchases, buy or lease products, and assess actual and/or estimated savings, if desired. Some embodiments include a product database having entries identifying information about lighting products, an efficiency application causing a computing device to collect lighting product information currently in use by a user via one or more graphical user interfaces, and an efficiency platform connected to computing devices executing the efficiency application.