Ok i have been using the ReefOptics 20K bulb but today i tried a Coralvue 14K bulb and the Coralvue 14K is really dim compared to the ReefOptics 20K should i switch back to the ReefOptics 20K or stick with the Coralvue 14K??? They are both 250watt bulbs why is the 14K noticably dimmer than the 20K??? Will i get better growth with the dimmer 14K???