The LED lights are not gonna get you anywhere near what you need. Unless you get one of the really expensive large LED units that claim to produce as much light as halides with less heat, power, etc... If you shell out the money for a large LED unit be prepared to have to replace parts on it about ever 4 months. The reviews on another forum show its not worth the money.
Now, on to your real situation. Like others have said, you did this in reverse order and should take the light loving corals back to the store.Hopefully they will take it back, if not try to find a local reef club -google it, and see if someone will at least hold them in their tank for you until you get the proper lighting. I'm guessing that if your lights weren't up to par and you had no idea what you were getting into with those purchases that your tank parameters probably aren't gonna be where they need to be as well. Whats your salinity, ph, ammonia, nitrite, nitrate, alk, and calcium? I still consider myself to be a new person to this hobby and I've had my tank set up for about 2 years now. Most important thing is to do your research before making any purchase for your tank. Some things require more or less light than others, some require a strong flow of water, and there are many ways to achieve both. Get yourself a god book on reefkeeping- I'm sure someone on here can suggest a good book with more experience than I can give. Take it slow and don't buy things in the LFS just because they look nice. If you like it, go home and google it to find out what your getting into, then go back and buy it if you choose to. Never trust the guy at the LFS. Some are great guys and will go out of their way to make sure you know what your getting, others have no clue. One near me has people working in the fish department that have never had a tank and definitely don't understand much about it other than getting whatever you tell them to get you tossing it in a bag and sending you on your way. It really sounds like you jumped into this a bit too fast, step back and slow down, it'll work out in the longrun.
