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Dimensions? I have one A160WE over my 18x22x22 cube and honestly, I would have two if my tank was more than 18 inches. I know that the visible light can be seen up to 24 inches, but I wouldn't trust it for SPS that far away from the light. Maybe softies and other low light corals might do well in that area, but they might grow slow. I would go with at least one A360WE for your 40G or at least 2 A160WE's. I'm assuming that your tank is 24 inches long.I get that is can spread that far but it's it strong enough for a lot of Lps. And dos
I would go with the 360we. unless you dont have a lot of rock work. I have 2 of the 150's over my 34g cube and its perfect so im thinking no way i would even consider 1 over anything larger.
looks goodI have three 160s over my 150H 48L×24W×30H. And it covers great.![]()
looks good[/QUOTE should I add another
yes this .....I forgot that you already have one, so yes, just add one more and you should be good to go.

