The "EL-Plug in System"; is a completely new type of power distribution system that allows power to be supplied through 5mm joints, one-touch mounting and dismounting of shelves, and no functional devices are noticeable. The "EL Plug-in Series"; is a series of parts for shelf lights that can be set up with a single touch of the "EL One Touch Connector" without any wiring work, in addition to our original energizing system.