Electric Light, Lamp, Electric Lamp
noun
An electricity lamp is an electric lamp. Nowadays they're all electricity, though, which means it's a lamp.
でんとう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
うちの嫁さんは全然電灯を消さないんだよね。きっとスイッチがあることを知らないんだと思うよ。
My wife never turns off the light. She probably doesn’t even know there is a switch.