LED write up on some popular units.

was reading some of this the other day and thought that some other people might have some interest in the info.this just confirms there should be much research of a product prior to purchase in the LED industry as things are still changing. not every unit utilizes the proper spectrum or color combination of LEDs and many of them you may not have the opportunity to see them in action wich makes choosing one even more daunting.
http://www.advancedaquarist.com/2012/3/aafeature
anyhow this is a decent read.