Pavement lights give sunlight into the basements below it during the day, and the basement gives light to the sidewalk from below during the night. These lights are meant to make basements more useful in cities and places where space is scarce. In places with high rent, these lights may make an area look better, which helps landlords make more money. People with these lights can also save on electricity during the day, because the lights are clear like a window, where sunlight can go through.