***WARNING...devil's advocate has just entered the room***
I totally agree that the 150watt MH
lights will pretty much turn a tank into a hot tub. However, have you considered the 70watt Vipor clamp on lamp by JBJ? It is less wattage and the design allows you to suspend the lamp several inches above the water. If you are heck-bent on MH
this is the only lamp I would consider.
So...the next question is, why MH
? If you would like some SPS
and a clam then go for it. If you are interested in LPS
and softies then look at a different option for lighting.