Do not know your country, but if you are in Europe there are other suppliers that offer a pcb board ,with lm561c.I have seen a prototype at a growing equipment exibition, (efficiency of 2,7mmol/j at 100w,passive cooling,but I do not remember all data exactly )available from December.Good question! The guy who is designing/building them knows his stuff and takes a very methodical scientific approach. He has all the kit to test his products and is selling them at a very reasonable price also.
I believe he doesn't ship internationally or I'd be the owner of a couple of his boards......