(3) A location where the adapter 100 is installed

(4) A transmission time interval (“transmission interval”) within which to transmit energizing information by the adapter 100

Regarding information (1) described above, the user inputs a serial number inscribed on the surface of the adapter 100. Regarding information (2) described above, the user inputs an arbitrary name for identifying the adapter 100 (such as an arbitrary character string that reminds of the location where the adapter 100 is installed). Regarding information (3) described above, the user inputs an arbitrary character string for identifying the location where the adapter 100 is installed.

Regarding information (4) described above, the user inputs a transmission time interval within which to transmit energizing information in accordance with application of the lighting that the adapter 100 connects and desired monitoring accuracy. More specifically, the lights located at areas including a lavatory, washstand, bedroom, and front door are usually turned on for a relatively short period of time. Therefore, the transmission interval for the adapters 100 installed at those areas may be set to about one minute. By contrast, the lights located at areas including a living room and a dining room are turned on for a relatively long period of time. Therefore, the transmission interval for the adapters 100 installed at those areas may be set to about 10 minutes.