I would try it, only way to find out how it goes. Mount them high and keep your lights on for 12+ hours, are they montis or acros? 4 for 30$ is a nice deal and if they take off in a few months get ready to buy stronger lights and more sps. I put 2 branching montis in my tank when it was 4 months old, within a couple months they where growing like weeds, so then I bought some acros, clams, lps, shrooms, zoa etc..., 2 years later and I've got a tank full of different corals and 16 fish, I call it " controlled chaos ", my last fish was added around 4 months ago, my last frags came from the WWC live sale a few weeks back(first online buy) and now my tank is pretty much maxed out and find myself trading trimmings for fish food to my lfs.