hey, well i personally think that a 250 watt se mh will work great on that tank, i used it on a 58 oceanic tank same measurements but only taller and my sps grew fast and looked great, 2 de pendants i think is overkill, you will have some heat issues forsure, just my opinion, all that par and other stuff i think doesn't really matter as long as they have some good light, remember that breeder tank you have is only 16 inches high + the 2" sandbed so 14 inches total, your about to cook some eggs with 2 de pendants!