| 摘要 |
PURPOSE: To compose a large number of lighting patterns in steps in the case a part of illumination is selectively extinguished and carry out illumination uniformly by individually providing respective rows of all the fluorescent lamps arranged in vertical rows with electricity supplying systems independent one another. CONSTITUTION: Two fluorescent lamps 2a, 2b are set in parallel mutually in the lower faces of respective combined-type luminaires 1 and terminal stands 3a, 3b with which respective sockets of the lamps 2a, 2b are, connected are installed in the combined-type luminaires 1. A connector 4a of a wiring for connection led out forward from a stand 3a of a foremost luminaire 1 is connected with an inverter 6a for electricity supply for an (a) system and a connector 4b for a wiring for connection led out forward from a stand 3b is connected with an inverter 6b for electricity supply for a (b) system. Consequently, electricity is supplied to all the lamps 2a arranged in one row by the inverter 6a and electricity is supplied to all the lamps 2b by the inverter 6b. As a result, lighting control can be carried out independently for every system and a large number of lighting patterns in steps are composed and uniform illuminance distribution can be provided. |
