Q: I have 16 Casambi controlled lights in an install, Can I use just the one DMXcas to control them?
A: If you are making one control zone of up to 4 Casambi channels, yes. You only get 4 channels of control per DMXcas.
Q: So, I could have the 12 lights split into 4 individual groups that could be switched and dimmed?
A: Each DMXcas is only capable of handling 4 Casambi channels, so each group of fixtures will need a DMXcas.