The Chinese word for street light is
路灯

lù dēng

Chinese Definition

Components
路
1. road; path; street
修路 - to build a road
2. pattern; arrangement; sequence
思路 - train of thought
紋路 - veined pattern
3. way; method
生路 - means of livelihood; way of subsistence
4. journey
回家的路很遠。 - It's a long journey to return home.
佢身體好虛，行幾步路都會暈。 - His body is very weak, walking only a few steps already makes him dizzy.
還有一公里的路要走。 -
5. route
三路進軍 - to advance along three routes
12 路公交車 - No. 12 bus
6. kind; type
7. region
各路人馬 - people from different places
8. -year-old, in multiples of ten; decade(s) of one's life; (Used for describing the style of people in such age range.)
三十-路大叔 - a man in his thirties -
七十-路 - [JAV featuring women in their seventies -
9. (historical) circuit (an administrative unit during the Song and Yuan dynasties)
灯
1. Simplified form of 燈