This is the Congressional Budget Office Cost Estimate as ordered reported by the Senate Committee on Homeland Security and Governmental Affairs on June 19, 2019. From the Document: "S. 1874 would require the General Services Administration (GSA) to procure lighting systems for use in federal buildings that are the most cost effective and energy efficient when measured over the systems' expected lifetime. (Life cycle costs include all capital and operating expenses associated with a system over its life expectancy of up to 40 years, including fuel costs.) The bill also would require GSA to issue guidance about the efficiency of new lighting products."
Congressional Budget Office: http://www.cbo.gov/