cant see the lastest pics. 
 
6500k will definitely brighten the tank. its considered a "daylight" spectrum. 
 
but it is yellowish. 6500k was a staple baseline spectrum long time ago. 
 
with supplemental lights, T5, LEDs... people tend to go higher like 10,000k for a more aesthetic light color. 
		
	
		
		
		
		
			
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