| 摘要 |
<p>PROBLEM TO BE SOLVED: To restrain the depth of discharge of a secondary battery in a luminaire from being deepened.SOLUTION: A switching control unit 18 reduces a dimming rate for an illumination load 11 through a dimming rate setting unit 13 by a greater amount, as the remaining capacity of secondary batteries 21a-21n used for illumination is smaller and the used amount of the secondary batteries 21a-21n in the past is greater. Here, as the dimming rate is smaller, the discharged amount of the secondary batteries 21a-21n is smaller. Therefore, the depth of discharge of the secondary batteries 21a-21n is restrained from being deepened.</p> |
