From PC to MH?

[bluetang]

I"m definately no expert on MH lighting but would suggest a PFO LIGHTING
deluxe hood. For what you have in your tank right now you can easily get a way with 2X175Watt bulbs with two VHO Actinics. THe thing is your tank is 4ft long so if you went with one bulb you would have a large dead spot.
If you want to toss in some hard corals you can move up to 250 Watters.
I would probably stay with 175watters due to the fact you only have 50 gallans in a 4 ft tank and your temp could go sky high. Tough choice..