so i was looking at this 36" inch light T5-ho 3ft / 2LAMP Aquarium lighting and was wondering if itd be good enough to support corals? also if i get one blue and one white should i get 6700k, 10k, or 14k?
Better off going with a 6x39w T5 HO fixture as it would allow you to keep anything you would want. The fixture you posted a link to would be enough for softies and some LPS, not sure about anything else though.
I agree with Thom. You would be OK for soft corals and leathers. Border line for LPS and not enough for an anemone or hard corals. Look into either a 4 bulb T5HO fixture or a 6 bulb if your tank is wide enough to fit it.