GHL and OSRAM Dimmable ballast question

[porter_painter]

Sorry for all the questions people, but I’m really struggling to understand the GHL website.

I already have a dimmable T5 ballast (Osram DALI) and fittings, and I’m looking to buy the Profilux Plus II EX. Do I need anything extra to be able to dim my lighting??

Thanks

[stevew@reefdreams]

You will need the Dali expansion card here:
http://www.ultimatereef.net/forums/showthread.php?t=312111

[porter_painter]

thanks steve. will that control more that one ballast?

[stevew@reefdreams]

Yep, up to 50 ballasts in 16 individually controllable groups. :)