灯 (Kanji for streetlight)

Onyomi

TOU	as in, 'The old man walked home drunk and stubbed his TOE on a streetlight. '

The streetlight stood straight like a big nail with a little electric fire on top of it.

街灯(がいとう)	streetlight ★☆☆☆☆ 街 (shopping district) + 灯 (streetlight) = 街灯 (streetlight)
電灯(でんとう)	lamp -(BOOBOO: in practice, everyone just says でんき) ☆☆☆☆☆ NP 電 (electricity) + 灯 (streetlight) = 電灯 (lamp -(BOOBOO: in practice, everyone just says でんき) )
懐中電灯(かいちゅうでんとう)	flashlight ☆☆☆☆☆ 懐 (nostalgia) + 中 (middle) + 電灯 (lamp -(BOOBOO: in practice, everyone just says でんき) ) = 懐中電灯 (flashlight)

	Meaning	Hint	Radical
灯	streetlight	NAIL	丁
炊	cook rice	LACK	欠

A streetlight is on top of a pole or a NAIL,

but you LACK water to boil some delicious kale.