Required for use of the fixtures, the Controller with DMX for FL 400 and FL 800 Flexible Panels with Gold Mount Battery Plate from Cineroid is the "brain" of the system. The ballast controls adjustments of color temperature from 2700 to 6500K and light intensity from 0 to 100%. Onboard DMX allows the adjustments to be made remotely from a console. An AC adapter is required to power the light and controller. This version of the controller has a battery plate for optional Gold Mount batteries that can power the fixture when mains current is unavailable.