Usage of the character 灯

lantern with a carousel of paper horses rotating under convection, used at Lantern Festival 元宵節／元宵节 ( Yuánxiāojié)
chaser lights
self-scrolling horizontal text display, such as a news ticker

dēnglóngyú

灯笼鱼

[燈籠魚]

lantern fish

fànguāngdēng

泛光灯

[泛光燈]

floodlight

shǎnguāngdēng

闪光灯

[閃光燈]

flash bulb (photography)

huàndēngjī

幻灯机

[幻燈機]

slide projector
overhead projector

dēnglóngkù

灯笼裤

[燈籠褲]

bloomers
plus fours
knickerbockers

zhuīguāngdēng

追光灯

[追光燈]

(theater) spotlight
followspot

rìguāngdēng

日光灯

[日光燈]

fluorescent light

chētóudēng

车头灯

[車頭燈]

(vehicle) headlight

jìnguāngdēng

近光灯

[近光燈]

low beam (headlights)

húguāngdēng

弧光灯

[弧光燈]

arc lamp

xīdǐngdēng

吸顶灯

[吸頂燈]

flush-mounted ceiling lamp (loanword)

yíngguāngdēng

萤光灯

[螢光燈]

Taiwan variant of 熒光燈／荧光灯 (yíngguāngdēng)

tóuguāngdēng

投光灯

[投光燈]

floodlight

zhuǎnxiàngdēng

转向灯

[轉向燈]

vehicle turn indicator light

tànzhàodēng

探照灯

[探照燈]

searchlight

yuǎnguāngdēng

远光灯

[遠光燈]

high beam (headlights)

Chūndēngmí

春灯谜

[春燈謎]

Spring lantern riddles (guessing game at Lantern Festival 元宵節／元宵节, at the end of Spring festival 春節／春节)

dēngxīncǎo

灯心草

[燈心草]

rush (botany)
Juncaceae

chuǎnghóngdēng

闯红灯

[闖紅燈]

to run a red light
failing to stop at a red traffic light
(slang) to have sex with a girl while she is menstruating

jiǔjīngdēng

酒精灯

[酒精燈]

spirit lamp

ānquándēng

安全灯

[安全燈]

safety lamp
safelight

qǔdēngr

取灯儿

[取燈兒]

(dialect) match (for lighting fire)

hóngdēngqū

红灯区

[紅燈區]

red-light district

shuǐyíndēng

水银灯

[水銀燈]

mercury-vapor lamp

Dēngtǎshì

灯塔市

[燈塔市]

Dengta, county-level city in Liaoyang 遼陽／辽阳 ( Liáoyáng), Liaoning

luòdìdēng

落地灯

[落地燈]

floor lamp

jiāotōngdēng

交通灯

[交通燈]

traffic light

Zhū Hóngdēng

朱红灯

[朱紅燈]

Zhu Hongdeng, one of the leaders of the Boxer Rebellion

Běnshēngdēng

本生灯

[本生燈]

Bunsen burner

huādēngxì

花灯戏

[花燈戲]

opera for popular in Sichuan and Yunnan

jùguāngdēng

聚光灯

[聚光燈]

spotlight

Hóngdēngjì

红灯记

[紅燈記]

The Legend of the Red Lantern

nánguādēng

南瓜灯

[南瓜燈]

jack-o'-lantern

qiándàdēng

前大灯

[前大燈]

headlight

bǎoxiǎndēng

保险灯

[保險燈]

kerosene lamp

Qílù Dēng

歧路灯

[歧路燈]

Lamp in the Side Street, novel by Qing dynasty writer Li Lüyuan 李綠園／李绿园 ( Lǐ Lüyuán)
also written 岐路燈／岐路灯 ( Qílù Dēng)

dēngcǎoróng

灯草绒

[燈草絨]

see 燈芯絨／灯芯绒 (dēngxīnróng)

hángbiāodēng

航标灯

[航標燈]

lighted buoy
channel marking light
signal light

kāilüdēng

开绿灯

[開綠燈]

to give the green light
to give the go-ahead

jiénéngdēng

节能灯

[節能燈]

compact fluorescent lamp (CFL)

níhóngdēng

霓虹灯

[霓虹燈]

neon lamp (loanword)

huàndēngpiàn

幻灯片

[幻燈片]

slide (photography, presentation software)
filmstrip
transparency

dēnglónghuā

灯笼花

[燈籠花]

Chinese enkianthus

kǒngmíngdēng

孔明灯

[孔明燈]

sky lantern (miniature hot-air balloon used during festivals)

dēngxiàhēi

灯下黑

[燈下黑]

(lit.) it's dark right under the lamp
(fig.) people tend to overlook things right under their noses

diàndēngpào

电灯泡

[電燈泡]

light bulb
(slang) unwanted third guest

zǒumǎdēng

走马灯

[走馬燈]

lantern with a carousel of paper horses rotating under convection, used at Lantern Festival 元宵節／元宵节 ( Yuánxiāojié)
(fig.) revolving door; musical chairs (metaphor for people being shuffled around into different jobs)

dēnglóngguǒ

灯笼果

[燈籠果]