I just got my aqua medic 150watt pendant in but i am unhappy with the 10k bulb. The pendant will be over a 20high and i plan to keep mostly lps, zoas, softies and maybe a clam or sps. I am looking to get a new bulb but am unsure what kind. What is a good brand and also what is a good spectrum that will make the coral colors stand out and also have good growth? Also will a chiller be necssary to keep temps down because i really cant aford a chiller right now.