Need advice from lighting gurus

[crystalz]

I have a coralife HQI/pc combo and I was looking at the ballast. the pc ballast has the same rating as a t5 ballast I have(120v ac 60Hz) except that the pc's are 96 watt and the t5s are 55watt. I was wondering if i could use the pc ballasts with the t5 bulb adapters but haven't gained the courage to try it on such a pricey fixture though it would be a nice upgrade..