Maybe one of the LED folks will pop in, but I don't think those cheap LED's are good for growing. A legit LED will be a few (several) hundred dollars per fixture. You can build a good one for much less if you have basic assembly skills.
What's your grow area like? Size, conditions, etc. Heat is the greatest obstacle indoor grows face, imo, so your grow space plays heavily into the type of lighting you can deploy. A 600W HID is a good choice for 4 plants, but they're hot, you'll need a way to remove the heat unless you're in a big room.