Streetlights are the lights on tall poles along the roads that help people see when it is dark outside.
Streetlights make the streets safer and help people see where they are going at night.
Examples:
The streetlights turn on when it gets dark outside.
The streetlights make the road bright at night.
I like to look at the streetlights when I go for a walk at night.
The streetlights look like big stars on sticks.
The streetlights make the whole street as bright as day.
The streetlights make the night less scary.