明かりがパッとついた。

明かりがぱっとついた。

The light came on suddenly.

明(あ)かりがパッとついた。

Akari ga pa to tsuita.

明かり (あかり)

light; illumination; glow; gleam; lamp; light

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

パッ (パッ)

poof

と (と)

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

注ぐ (つぐ)

(usu. written as kana when referring to a solid) to pour (into a vessel); to fill; to dish out food or drink

Readings: メイ、ミョウ、ミン、あ.かり、あか.るい、あか.るむ、あか.らむ、あき.らか、あ.ける、 -あ.け、あ.く、あ.くる、あ.かす

Meanings: bright, light