@ Y-Phil: Try adding a Blackbody node to the emission color connector and you can create global illumination to the exact color temperature of your environment. The shader below is my setup for having different Kevin degree values for different lighting conditions. Combining the TheAnimaGemini node arrangement, I can control color temperature and modulate the brightness.

I would stay away from color temperatures around 1500 degrees, that is the color of candlelight and it does not render well as global illumination.