| 摘要 |
PROBLEM TO BE SOLVED: To prevent deterioration of emergency power by preventing wasteful charge and discharge of the emergency power in such a case that temporary power supply is used in a building of pre-completion, having an installed illumination device.SOLUTION: In an illumination device 10, a function changeover switch 25 is selected to one of a commercial power supply mode and a temporary power supply mode. In the case of blackout, if the function changeover switch 25 is selected to the commercial power supply mode, a lighting control unit 10a lights a light source 51 by power supplied from a commercial power supply 11, and if the function changeover switch 25 is selected to the temporary power supply mode, the lighting control unit 10a lights the light source 51 by power supplied from a temporary power supply 12. |
