| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an illumination control apparatus for illuminating suitably without complicated operation. SOLUTION: A main operation panel 1 turns on, turns off and controls the illumination load 4 having high-voltage discharge lamp of each terminal 31, 32,..., 3n. By accumulating signal of data from each daylight sensor 51, 52,..., 5m, for example responding to primary partial shade such as bird flying, lightening of the cooling load from lighting 4 is prevented. On the basis of sky lightening from the daylight sensor 51, 52,..., 5m, in the 4 stages, the illuminating level is changed depending on the illuminating level fixed in response to the lightening. By changing the lightening slowly, in the case of changing from cloudy to clearness slowly or from clearness to cloudy, the change of illumination can be prevented. Flickering or furtive extinguishments of the high-pressure discharge lamp by instability on illuminating is prevented, control of brightness of the cooling load from light 4 is corrected.</p> |
