Abstract: The present invention allows flexible reinstallation of a region capable of communicating with a wireless LAN and a master and a repeater of a wireless LAN in conformity with a site to install an illumination system. Therefore, the present invention is an illumination system including an illumination unit using a device emitting a light by having a direct current power supplied thereto. The illumination system of the present invention includes: a general purpose terminal allowing to be connected to a communication system capable of communicating with an external device spaced apart from the illumination system, the terminal also capable of supplying an electric power to the communication system; and a conversion unit supplying the direct current power applied to the illumination unit to the general purpose terminal by converting the power to be used in the communication system.

Abstract: Provided is a supporting device that enables light emitting modules to be easily installed on a ceiling for lighting and is easy to modify the light emitting modules with a simple configuration. For that purpose, a supporting device of the present invention has a large recess groove portion having a width dimension smaller than a dimension of a short side of the light emitting modules and having a length dimension larger than a dimension of a long side of the light emitting modules and a screw fixation portion provided with a threaded hole for fastening on the ceiling. On left and right interior walls of the large recess groove portion, small recess groove portions, parallel to the large recess groove portion, having a cross sectional shape approximately equal to a cross sectional shape of a peripheral end portion of the long side of the light emitting modules are formed in an arrangement facing on the left and right respectively.

Abstract: Provided is a supporting device that enables light emitting modules to be easily installed on a system ceiling for lighting and is easy to modify the light emitting modules with a simple configuration. For that purpose, the present invention is a supporting device to install an approximately rectangular light emitting module in a plate shape having predetermined dimensions in length and width on a system ceiling in which suspended T bars are arranged in a predetermined dimension at least in parallel on a ceiling The supporting device of the present invention has: a dimension of a long side to be an interval dimension of the T bars in parallel; and an opening having opening dimensions not blocking a light emitting portion of the light emitting module by having a short side dimension smaller than a dimension of a short side of the light emitting module in a direction along the long side of the supporting device.