A nearby town does not have any streetlights in the residential area. Lights are expensive, and cars have headlights. People drive more slowly or avoid the area. Children play under the streetlights and can hide in the shadows. If walking at night carry a flashlight, or walk during the day.
Lights are expensive.
If the lamp burns out, the light won't work in an unexpected emergency. Turn the light off when not using it, or put it on a motion detector or timer. Some motion detectors have alarms in addition to the lights. Maybe you need a new washing machine. As a case study let's look at a typical streetlight situation.