For what is worth, TRIAD ballasts are supposed t run T5's better than Fulham Work Horse ballasts.
Fulhham Work Horse Ballasts are supposed to run VHO's better than TRIAD's. Actually, the TRIAD ballast itself doesnot list any VHO capabilities.
IceCap can run either but in my experience so far, it runs actinics whiter than with regular output, spec TRIAD ballast.
Hope this helps, JOHNNY