I thought that Perry was somewhat secretive as to whether it really was a M135 or a M155 or a M131 (or an EIEIO for that matter). For example you can't crack those cases open without voiding the warrantee. But maybe I'm wrong about it being a "secret", I just stumbed upon this thread where he mentions in passing that the M135 is the best domestic ballast for the Radium ....
http://www.reefcentral.com/vbulletin...threadid=93807
So ... um I guess that does answer my question (I think it answers Canadian_Man's as well
)
I didn't really want to call Perry and ask him that ... um .. hey can you tell me what's in your ballast, so that I don't have to buy it from you?
Great way to start off in a good "light".
Thank you much for the info (for me this is academic I have no cash to switch over my lighting today, but maybe down the road I'll jump on this Radium bandwagon).