More light the better. Example I have 840watts on a 120 gal (48x 24, 24) and I have seen the same tanks with over 1500watts. I thought I was on over kill, but their tanks looked even better. Go as big as you budget can allow, you wont regret it. Hope that helped! _________  120 RR AGA, 2000gph, 840watts lighting, Aqua C- 150 (w/ mag12), DIY Kalk Reactor, 7 years reef keeping
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