Living-room HID uplighter v.4 - in operation

In the latest version of my living-room HID uplighter (it's been a 20+ year story, and I'll be doing some changes soon too), there are four discharge lamps and their (sort of) matching electronic ballasts. Two of those are dimmable and some of the controls are located in the front panel. Adjusting the intensity of some lamps, and/or switching them on/off enables many different combinations resulting in a wide variety of light intensities and colors.