noun
votive light; light offered to a deity or Buddha
A light, typically an oil lamp or candle, placed on a Buddhist altar or Shinto shrine as an offering.
仏壇に灯明をあげる。
I offer a votive light at the Buddhist altar.
お寺で灯明が静かに揺れていた。
The votive lights flickered quietly in the temple.
Compound of 灯 (tō, 'light') and 明 (myō, 'brightness'). The reading とうみょう is the go-on reading of the characters.