frag tank lights

[My Coral Reef]

i have a frag tank that is 72x28x12 i have 2-250 watt radium 20 k with 2- lumanmax elite mogul and a dual galaxy ballat in mid. of that tank is a little dark would it be better to put one 400 watt radium 20k on a light rail
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[tangdiver]

Light rail are not as good.....IMO. I would look at putting the lower light corals, IE chalices and LPS in that area.

Just my thougths