This item was kept unused since 2012 because it was not installed as standard equipment by the house manufacturer, and a different product was installed instead. Lighting has been confirmed. It uses a krypton bulb (60W E17). This product is compatible with LED bulbs (sold separately). It is for the entrance and is suitable for a 3-tatami mat area. (The box is not crushed, but it has a handwritten note "ceiling light" in magic marker.)