I hope i get this right.  and i wont be offended if i'm wrong but don't badh the heck of out of me... 
 
alot of the 6500k  will make its way down there its the color that pushes it to the bottom so if you look at the 20 K color its has to filter out is color to make it to the bottom.  Because I believe and some one can back me up on this  or help me out  blues are the first color to go, when its in the water. IE as you go thur the leve lof water. 
 
And Yellow /white hardly hasa nay color to defuse thur the waves of water. 
 
So the lower K rating will break longer thur the water then a 50 K or a 20 K 
		
	
		
		
		
		
			
				__________________ 
				180 starfire front, LPS, millipora  
Doesn't matter how much you have been reading until you take the plunge.  
You don't know as much as you think.
			 
		
		
		
		
	
		
		
	
	
	 |