Correct

熄灯

/ xīdēng /
Strokes

Definition

turn out the lights/lights out

Example

As a Verb

put out a light/lamp; quench a lamp; turn/switch off a light; snuff off/out a candle

1
shè
宿舍
wǎnshang
晚上
shí
十一
diǎn
dēng
熄灯
  

Lights in the dorms are switched off at 11 pm.

2
dēng
熄灯
hòu
不许
shuōhuà
说话
  

No talking after lights-out!

3
dēng
熄灯
jiùqǐn
就寝

put out the light and go to sleep