120 gal sps lighting question

[pondwater]

I am putting together an sps tank in 120 gallon euro brace tank. The tank is 48x24x24. I am going to use two se bulbs on hqi ballasts. 20k radiums. I am lookind for input on whether I should go with 400 or 250 watt ballasts/bulbs. I would be using actinic sup. lighting as well. 400 watt may be overkill but I know it would give good coverage at the bottom. Lumenarc reflectors. The bulbs would be elevated 10-12 inches off the water line.
Thanks

[JAustin]

400W Radiums on coravue 400W dim-able ballasts. Turn them down to about 360W and get a year out of the bulbs and grow sps 24" down on the sand.

[pondwater]

comments?