FSX/P3D. Night Environment is a series of add-ons for FSX and P3D that revolutionizes the way the world looks at night. Using a series of databases it will add lights to roads and other areas. Hundreds of thousands of lights (in some Night Environment editions millions) clearly show how highways connect cities and how smaller roads meander into neighborhoods. Visual navigation at night becomes a real option and even easier than during daytime just as it often is in real aviation. Night Environment France comes with a powerful yet easy to use management tool that allows you to toggle and tweak all types of lights. As the Paris region is one of the densest populated areas in the world the manager even has a separate area for that. More details via the source link below.