T5 dimmable ballast and Apex help

[reefwithareefer]

Originally Posted by sphelps

The ballasts have to be dimmable and you'll require 0-10v control capabilities on your apex. Sylvania brand ballasts are probably the most commonly used.

Thanks.
The 0-10 capabilities...Is that what the ballasts have to be to be compatible with the Apex or do I have to but an add-on for the Apex.
Sorry if it is a dumb question. I am electrically challenged.