| 摘要 |
PROBLEM TO BE SOLVED: To enable a user to easily change a lighting holding time even after installation without requiring any large-scaled facility in the case of installation, in a lighting instrument 1 comprising a delay light-off function.SOLUTION: The lighting instrument 1 to which a commercial power source is supplied via a switch part 15 comprises: a battery 5; a turning-on device 4 for turning on a light source 16 with power supplied from the commercial power source; and a control unit 6 in which, after power supply from the commercial power source is stopped, the battery 5 is used as a power source and power is supplied to the light source 16 so as to turn on the light source 16 continuously for a lighting holding time which is preset by a setting dial 8. The lighting holding time after turning-off can be arbitrarily set in the single illumination instrument. |
