Choose that control unit to expose color paper either in RA4 or Ilfochrome processes.
The color of light output is composed of primary colors Red, Green, and Blue. Each color is modified separate by a rotary knobwith rests.
A yellow low luminance display indicates filter equivalent values in the range of 0 … 200.
White light for focusing is selected by pushing a knob.
A high tech 24V power supply ensures stable light output, even during mains voltage fluctuations.
The exposure time is controlled by a timer or color Analyser already existing in your dark room.