This work will determine the savings and the cost-effectiveness of advanced rooftop unit controller (ARC) Light Retrofits. This work will support a new evaluated measure through the development of a Standard Protocol, based on 38 Zeros meters and the ARC retrofit fan-only analysis. Utility grants will fully fund the installation of up to 30 ARC Light Retrofits, where 38 Zeros meter installations are also fully funded, with one-year of data hosting. (ARC Light Retrofits are expected to cost around $2,000, while the 38 Zeros meter installations are expected to cost around $1,500, including one year of data-hosting and retrieval of the 38 Zeros meter.) All grants will be paid by 9/15/15 because of the inability to spend money in the new rate period. Based on EER feedback, utilities will claim self-funded (non-EEI) savings as FY15 custom projects.