There isn't any powersun info, that's all about the megaray bulbs. The only thing really mentioned about the powersun is to mount it vertically which is true for all mvb's. I personally stick with the trusted reptisun tube bulbs and a heat light.
Pretty old information, but a good history lesson nonetheless. MegaRay are an incredibly good brand however. Those original MegaRays were some of the best lights made, and there are some still being used to this day. I have a friend with two still that are, even after four years of daily use, producing good UV.
Yeah im pretty sure the powersun I had ruined mvb's for me, I'm sure i wont trust any until I get a UV meter. Im just paranoid, im sure there is always a chance of a malfunction in any bulb. I have heard better thing about the megarays though.