First of all, LPS corals are stony corals, they have a hard skeleton. For the corals you mentioned i would go with a T5 fixture that holds 6 bulbs and has individual reflectors.I would go with 3 10k bulbs and 3 actinics. be sure to research what brand of bulbs are good. This will allow you to keep softies(zoos,shrooms,leathers) any where in the tank and LPS (brains, hammers, candies) in the upper half.(you could probably get away with LPS anywhere with the mentioned light but to be safe put them higher) Keep in mind that if you keep stony corals you will have to keep an eye on your calcium and alkalinity levels along with the usual stuff. You may have to add B-ionic or another calc./alk. supplement if your levels fall to low.(but if you only have a couple LPs you probably won't have to worry about this.) another thing, since you will be adding more light algae can grow faster if there is too much nutrients in the tank. Therefore, a good skimmer is necessary if you don't have one. what kind of fish etc. do you already have in the tank? Some fish eat corals. and remember, take your time, research, and do it right the first time.