PPIAF’s Sub-National Technical Assistance Program (SNTA) and its World Bank Group partners—the International Finance Corporation (IFC) and the Energy Sector Management Assistance Program (ESMAP)—have been working with the Brazilian municipalities of Belo Horizonte and Rio de Janeiro to bring energy-efficient investment to public street-lighting systems. The program, which includes early-stage feasibility analysis and technical assistance, has prompted Belo Horizonte to begin implementing a 178,000 points-of-light (PoL) system under a PPP structure. Rio plans to incorporate a 320,000-PoL system in its 2017-2020 city development plan. These projects will reduce energy costs and green-house gas (GHG) emissions. The study is also influencing investigators who are evaluating how to introduce energy-efficient street-lighting to other small and large municipalities across the country.