With Christmas fast approaching, I'm looking to upgrade my reef tank!! I'm thinking of going from a 10 to a 20 gallon long. My only barrier, is lighting, I'm using PCs on my 10, works great on softies, if I went 20 I was thinking about getting a t5 or halide, but LEDs caught my eye, the light gives the crispness, and harshness of the halide, minus the heat, but are they just for supplement? Or can I use LEDs as my primary light? Will I be able to grow lps? Clams? Do the "watts per gallon" principles apply,? I'm researching, bur hearing first hand from other reefers rather than the guy selling them, thanks guys!!!!