(ろうそく)

ろうそく
noun
candle
1. candle
A cylinder of wax with a wick that produces light when burned.
蝋燭(ろうそく)()をつける
To light a candle.
ケーキ蝋燭(ろうそく)()てる
To put candles on a cake.
We use candles during power outages.
Please put out the candle.
I blew out the birthday cake candles, and everyone clapped.

蝋燭(ろうそく) refers to a candle. The kanji are difficult and rarely written; hiragana ろうそく is much more common in everyday use.

COMMON EXPRESSIONS:

CULTURAL CONTEXT:
Candles are used at 仏壇(ぶつだん) (Buddhist altars) and during 法事(ほうじ) (memorial services). Birthday cakes also use candles (誕生日(たんじょうび)ケーキ蝋燭(ろうそく)).

CONTRAST WITH キャンドル:
キャンドル (from English "candle") is used more for decorative or aromatic candles, while 蝋燭(ろうそく) covers all candles including traditional and practical ones.