Abstract: Air conditioning-related equipment includes: a first connection portion to which wiring for transmitting high voltage along with communication is connected; a second connection portion to which wiring dedicated to communication and not to power transmission or wiring for transmitting low voltage along with communication is connected; and a connection circuit that connects the first connection portion and the second connection portion, wherein the connection circuit includes an isolation circuit that blocks power transmission and transmits a signal pertaining to communication.

Abstract: A relay device is provided between a first air-conditioning related apparatus and a second air-conditioning related apparatus. The first air-conditioning related apparatus and the second air-conditioning related apparatus perform multi-hopping communication via a transmission line. The relay device relays the multi-hopping communication.

Abstract: [Problems to be Solved] In technology for identifying the position of an indoor terminal with high accuracy, the cost for installing a transmitter is high for the introduction of the position identifying technique which uses a transmitter to send a weak electric wave such as in Bluetooth, RFID, and the like, or an emitter to emit an infrared ray. [Means to Solve the Problems] Power is acquired from the existing lighting equipment to operate the transmitter which sends a weak electric wave such as in Bluetooth, RFID, and the like, or an emitter which emits an infrared ray.

Abstract: By adding the afterglow function to the incandescent lamp, it is made easier, in the place where the incandescent lamp is used, to recognize objects nearby in the darkness after the lamp is turned off or when the electrical power is cut off. An incandescent lamp wherein an inner surface of a glass globe is coated with a phosphorescent phosphor is provided. For the phosphorescent phosphor, there can be used a phosphorescent phosphor comprising, as a host crystal, a compound of the general formula either MAl2O4 or MAl14O25 wherein M is one or more of metal elements selected from the group consisting of calcium, strontium and barium, and utilizing europium (Eu) as an activator, together with dysprosium (Dy) or neodymium (Nd) as a coactivator; as well as a phosphorescent phosphor comprising Y2O2S as a host crystal, and utilizing europium (Eu), magnesium (Mg) or titanium (Ti) as an activator.