Development of a daylight responsive dimming system and preliminary evaluation of system performance

In order to make a daylight responsive dimming system itself more flexible and reliable in both control method and system operation, a new system cont rolled by a computer software program has been developed. The light output from the dimmed luminaires is determined by the selected control algorithm, or is manually controlled in the computer software program. In this paper, the components of such a system are described, and the quantitative aspect of system performance has been evaluated. The results show accuracy and re liability on system performance. The workplane illuminance is maintained re latively close to the target level, and 30-70% of total lighting energy can be saved accordingly. (C) 2000 Elsevier Science Ltd. All rights reserved.