Controlling a dimmable MH ballast via 1-10v

[jporter]

I have 2 Reef Brite dimmable MH ballast that work via a standard 1-10v connection. Each ballast has it's own 1-10v cable and I would rather combine them into a single 1-10v input on the Profilux. Would a YL2 cable help me save a port on the back of my Profilux 4 controller? So MH ballast 1 is on ch1, and the second ballast would be on ch2. I don't necessarily want to individually control them, just looking to use as few ports as possible on the controller. I do however need to keep them from running at 100%. I'm converting over form an APEX system and not familiar with the Profilux which I have on order.