| 摘要 |
PURPOSE:To perform remote control of 150% switching of light output of lighting fixtures by controlling lighting of a plurality of slave machines which can be lighted by 150% light flux of rated light flux based on a lighting control signal from a host machine corresponding to the address of each slave machine. CONSTITUTION:If louvers are installed at lighting fixutes 11, 12, 13, 14 in a lighting area A for preventing radiation to VDT's, for example, then their degree of direct down radiation is reduced. A lighting control signal of a signal for 150% light flux is therefore sent from a host machine 4 to fixtures 11-14. A slave machine 61 receives this lighting control signal and supplies a lighting level control signal to high frequency lighting devices 31-34 of the fixtures 11-14. As a result, the devices 31-34 light fluorescent lamps 21-28 to obtain 150% light flux. If lighting fixtures to be lighted by 150% light flux are changed by a layout change in an office, it can be coped with by sending a desired lighting control signal corresponding to an address accordingly. |
