if you go with the cree leds you should be able to grow anything, I have seen some really nice foreground carpets grown under LED, but you have to have the cree ones that need a heat sink, not the no heat ones if you plan on growing anything serious, there is a reef guy around here that will make the equivalent of 250watt MH for a 48" tank, for about $250.. nice setups 60 degree optics,,, good luck you will def save some money on the light bill and with out it needing a ton of light you can probably get away with a dozen cree leds over the stretch of the tank..., get an aluminum heat sink offline and DIY if you a handy dude...