I like this quote:doh:. Tell that to my Radium 20Ks.
*The 20,000 K bulb is more blue yet and brings out all of the fluorescent pigments in many corals (making for a very nice appearance). However the best tests and observations show that when used alone the growth rate of SPS corals come to a complete standstill with 20,000 K lamps. Although maybe a good supplement for appearance, these bulbs are over rated for use as the only reef Kelvin temperature and should be avoided when used as the only</em> Kelvin temperature lights