CTC (Color Temperature Control) CTC is available for the Beam on the CTC channel 14. Setting this channel to DMX value 20 or above allows you to adjust the Beam’s overall color temperature, i.e. the color that has been set using the color wheel channel or the RGBW channels. Note that the more saturated the color, the less it will be affected by adjustments in color temperature. The biggest CTC variation is available when displaying white. Overall color temperature can be varied from 10 000 - 2500 K. In calibrated mode, CTC affects the available color spectrum and maximum output slightly. To obtain the full color and output ranges, disable CTC by setting the CTC channel to zero.