Danny: I have 4 X 110 watt VHO's, and my RBTA & GBTA's have been doing great. If your running MH's then you'll be in great shape
Ajaya: Got your PM, it was a few minutes after Danny replied to the post, so if he decide's to pass, I will make it available to you next.
And to answer your question, I think it might be best to pose the question to the general community, I have never owned Power Compacts, so I couldn't tell you for sure if 165w of PC lighting would be enough. What I can tell you is that RBTA & GBTA don't require alot of light, which is the reason I choose to keep them in my tank.