Thank you for viewing. This is an interior light for TOMIX HO gauge Kiha 40. This is a set for 3 cars. We are selling them for 1900 yen per car, so it's a bit of a bargain. The test bed is the 1700 series, but I think it can be used on other Kiha 40s if they have a toilet. If you want multiple units, please comment. It is made by cutting out plastic plates and using tape LEDs. It is equipped with a large capacitor, and will light up with the same brightness for about 2 minutes even if the power is disconnected. Due to the specifications, it will not light up immediately. It will not charge below 7V. (It is charged at 11 o'clock or higher with the KATO 16V power unit. It will generally charge unless running at extremely low speeds.) Please store the large capacitor inside the toilet. Copper plates are included for testing. Please bend them to use. Soldering the wiring is recommended if possible. We have released a video on Youtube comparing it with the genuine interior light and its power storage performance. Please search for 【TOMIX Kiha 40蓄電式室内灯】.