Like I mentioned before, all of you lights need to replaced on a regular basis,as far as the light spectrum, thats a decision you need to make,(10000,12000,15000,20000,ect.)on my one personal tank(120g) I run two 15k 250 watt MH's,on a 7 hour schedule then 2,110 watt Actinic's on a 10hr. schedule and a 250mh. (20k)for two 1.5hr regiments throughout the day,but I have a lot of larger corals in my tank. You have an afull lot of light in that tank you might want to try and shorten the time they are on.