Godan verb with 'ku' ending, Intransitive verbto be lit (of a lamp, burner, etc.); to catch fire; to ignite; to start burning · to be turned on (of a light, appliance, etc.); to come on

Godan verb with 'ru' ending, Intransitive verbto be lit (e.g. candle, lamp, light bulb); to be lighted; to be burning