Patent ID: 8905586
Filing Date: 2014-12-09
Classification: F21S,F21V,F21Y

Abstract:
1. A hybrid illumination system, comprising: a natural lighting apparatus, comprising: an artificial illumination mechanism supplying artificial illumination via a lighting fixture; and a hybrid controller controlling natural illumination provided by the natural lighting apparatus and artificial illumination provided by the artificial illumination mechanism, the hybrid controller comprising: wherein, when the luminance measured by the luminance sensor is lower than the minimum reference luminance stored in the memory, the hybrid control module sets operation of the lighting fixture based on each luminance level measured by the luminance sensor, and repeats a process of operating the lighting fixture by increasing stepwise a luminance level at which the lighting fixture is operated, from a lowest luminance level to a higher luminance level, until a measured luminance level is greater than or equal to the minimum reference luminance.