Exterior lighting for buildings, parking lots, city streets and traffic signals can contribute up to 25% of a city's operational carbon footprint. While outdoor lighting and signals are a small percentage of all lighting energy use (public and private) in the city, these uses are important opportunities for city government to address as they work to improve public sector sustainability and night time visual quality in the city. Recent advances in lighting, signal and intersection technologies allow a city to provide better quality and safer lighting for lower costs and energy usage with short capital payback periods (2 to 7 years). Additionally, new smart/internet-of-things (IoT) technology allows added functionality on street lighting. And finally, as city government addresses outdoor lighting, it can then use its understanding of the issues to better work with private owners in the city to improve their lighting.