To me, dmx control of a fogger is overkill unless you a have a totally pro unit and have a specific use for it, like cannon blasts, dragon mouth, etc... For the typical graveyard fog, I use 2 cheap 700W with their own timers offset by one another. One is off and reheating while the other is is fogging. The goal being constant low lying fog. In a graveyard scene, chilling the fog is more critical for a good effect.