| 摘要 |
PURPOSE: To provide a device improved and constituted so as to eliminate defects of a conventional device. CONSTITUTION: A lighting system 10 is provided with at least another lamp B, blue light is emitted from the lamp B and mixed with light from a white lamp W, and at the time of reducing the lamp controlling power of the lamp W by mixing, the color position of mixed light is maintained at a fixed position or deviated to a white point position in accordance with a chromaticity graphic. |
