Lighting for a 46gal corner tank?

[Toadally]

I'm thinking about upgrading to a 46gal corner tank and I'm wanting to use a Radium MH bulb. It's going into a SLS LumenMax 2 pendant. Should I go with a 250w or 400w bulb? It's going to be mostly SPS coral and a few LPS. No other lighting will be used. I don't want it to be too blue, but at the same time I don't want it to be too white either. What ballast should I use, M80 or electronic HQI? Thanks for any and all replies!

 

[premilove]

250 with icecap ballast

http://www.manhattanreefs.com/forum/sale-trade/63192-fs-icecap-250w-mh-ballast-50-a.html