i dont dought what you say, but i find it hard to belive that pic was taken
under a 6500K Iwasaki bulb, its to white. IME the Iwasaki's are very yellow
and that is why i will only use them on my growout tank and would NEVER use
one on a display tank.

kc

"Rod" wrote in message
...

the 20KK bulbs IME give much better coloration but less growth.



True in some cases but not all.. I have found that many corals color best
under
6500k iwasakis (coloration is better because of the MUCH higher PAR) and
some
corals color better under 20000K radiums.. (Less par but higher Kelvin).
here
is an example of a mille that has been under Iwasakis only(no actinic)..
under
Radiums this coral was not half as colorful as it is under Iwasaki 6500k.
http://www.asplashoflife.com/magneta.gif
Rod Buehler
www.asplashoflife.com