Lighting 90 gallon

[Liverocknroll]

2 Halide 150w 20k and 4 t5 bulbs good enough for coral growth?

[rtrice1]

would the t5s be actinic? that may be too much blue. bump the halide wattage to 250w each and reduce the kelvin to 12 or 14k

[unitedbga]

That should be enough to grow anything as long as you're using good reflectors. If I could make a recommendation go with the Phoenix 14k bulbs. They are very blue and have more output then most 20k bulbs. For T5HO bulbs check out ATI's line.
I like a lot of blue so 2 Coral Plus bulbs and 2 True Actinic bulbs would give that affect. But like I said I like a lot of blue.

http://www.atinorthamerica.com/bulbs.php

[Liverocknroll]

the halides are suppose to be blue, they have a light tinting of blue on them while the t5s are all actinic, I have a blotched anthias so the white I get from the halides is welcomed due to blue washing out that fishes true colors.