| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enable to inform that a lamp 30 is at the end of its lifetime when either lamp 30 of a plurality of illumination fixtures really come to the end of lifetime regardless of the rated lifetime of the lamp 30. <P>SOLUTION: In the illumination control system in which a control device 60 and a light control type illumination fixture 40 are combined, this is provided with a function to input the light control signals corresponding to lighting accumulated time of the lamp 30 and the environment and the setting by a brightness censor 61, a timer 62 or the like, and it is transmitted to the control device by short-circuiting two light control signal lines 50 that the lamp has come to the lifetime. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
