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
Sùshè
宿舍
wǎnshang
晚上
shíyī
十一
diǎn
点
xīdēng
熄灯
  
。

Lights in the dorms are switched off at 11 pm.

2
Xīdēng
熄灯
hòu
后
bùxǔ
不许
shuōhuà
说话
  
。

No talking after lights-out!

3
Xīdēng
熄灯
jiùqǐn
就寝

put out the light and go to sleep