Anyone using XM 250w 20k's?

[kozmo02]

water flow is actually more crucial, but that's a whole different topic

http://www.advancedaquarist.com/2006/6/aafeature2

 

[Stoney Mahony]

I have 2 x 20kxm 400w on my 55 wide. Too much light? Heck no! They love it. Colors are very bright. Poppin baby, poppin.