Hi,
Here is a link for dimmable ballasts
http://www.sylvania.com/content/disp...m&id=003678766
Whatever you choose make sure they are not DALI type!. I will also check to see if the GHL distributor is stocking the correct ballasts for supply.
The control board is seperate, you have a few options depending on your lighting situation. One acts as just an interface and you would have to have the lights on a timer to shut off the main power to the lights when you are at zero point dimming, this is the cheapest option, the second option is an all in one card EVG-AP-2F which has built in zero point switching, it also acts as the interface and can be used for up to 2 ballasts. The second option is a PCB so would need internal mounting. Wiring of both is straight forward.
With regards to prices, the cheapest option would be for the interface board around $19CAD and the more expensive fully switchable unit $39CAD. These are approx prices, but would not be far off the mark.
Hope this helps
Michael
www.aqua-digital.com