まめでんとう 豆電灯 LinksSentence search for 豆電灯Sentence search for まめでんとうSentence search for 豆電燈Kanji details for 豆, 電 and 灯Edit in JMdict Noun1. small lightRare term, See also 豆電球Other forms豆電燈 【まめでんとう】Notes豆電燈: Out-dated kanji or kanji usage. Discussions Log in to talk about this word.