A light placed on a street to help people see at night.
When it got dark, the streetlights turned on, making the streets bright.
天黑了,路燈亮了,街道變得明亮。
A helpful guide or idea that helps you find your way.
Her advice was like a streetlight, showing me the right path.
她的建議就像一盞路燈,為我指明了正確的道路。