Variable color temperature lighting device

(57) while setting Abstract: The Objective color temperature in a plurality of steps, providing a variable color temperature lighting device that varies smoothly without discomfort. [Configuration] luminaire 1 is provided with different types of light sources 2R, 2G, and 2B luminescent colors. Each light source 2R, 2G, light emission amount ratio of 2B is determined by the dimming data of a plurality steps stored in the storage unit 6. The difference in the respective reciprocal values ​​of two-stage color temperature adjacent the storage unit 6 is set to the color temperature discriminating 閾程 degree. If Dase sequentially read dimming data stored in the storage unit 6, smoothly vary without color temperature remarkably, yet can recognize the change of the color temperature approximately every one step.