I don't really remember, I got them thru someone who was abt to manufacter a quality light plus I bought 250 of them at one time. This was about 4 yrs ago, they may be cheaper now. But the Cree's were 635nm, most important to you will be 660nm, which were not available back then.

I mentioned before you should check out LedEngin,inc (google them) and consider using thier 5w diodes. They are available mounted on MCPCB and are sold thru Newark Electronics or Mouser Electronics. 5w 660nm are abt $9-10, 630nm are abt $8.50 and 730nm (if you incorporate them) also abt $8.50.

I would have recommended using thier 15w diodes, like Weezard used not to long ago, but they are not available anymore, or "not in the foreseeable future". I offered to buy 100pcs of them, which is a production run, but it did not work out.

OM