Satistronics.com is pretty good to work with. At $2 per LED (3w) it's hard to beat. Keep in mind their efficiency isn't nearly as good as Cree or Luxeon, but for a planted tank, probably not an issue.
Their 10w white isn't bad either--- you can get the 10w LED, 10w driver, and fat heatsink for around $25-30.
I have one, and haven't put it to use yet, but it's neat as heck.
Their 10w white isn't bad either--- you can get the 10w LED, 10w driver, and fat heatsink for around $25-30.
I have one, and haven't put it to use yet, but it's neat as heck.