Thanks for your infor.  I have SPS, LPS and softy in my 90g tank, so 4foot double 4bulb fixtures works like a some brand 8bulb fixture?  I dont mind how the design is, I do mind what is can do. All I want is hydro usage down, heat issues and colour of coral. 
		
	
		
		
		
		
		
	
		
		
	
	
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