Hey Opie;

Whites work just fine?
Wish I had talked to you a year ago. Could have saved a little money and a lot of time.

Whites have come a long way baby, a very good example is the Cree XR-c warm white.
On paper it has good specs; 2,600-3,700 degree K. In it's spectral output it has a spike at abt. 440-450nm (output of die) and second larger curve (phospher reaction) that does go up 630-640nm.

Many LED's in the warm white, spike at 375-425 and have a reaction curve that stops short of red. Makes it's white enrgy in the orange-amber-green. No usable blue very little usable red. Yet it is a "warm white". They can even have Kelvin numbers that look good.

Even with the cree's, I want to see a independent spectral graph of them before I invest in trying them. Fell in that hole once.

Hope you can understand what I was trying to say, sometimes this is all too much for an old man.
oldmac Reviewed by oldmac on . LED grow lights... input please. Hello guys, I'm exchanging eMails with a representative from a LED company. I asked him if they could produce a custom light for growing, and here's what he told me: Our options are as follow: 940nm, 850nm, 660nm, 630nm, 610nm, 590nm 570nm, 530nm, 510nm, 470nm, 460nm, 400nm and a total of 64 LEDs in the bulb. Rating: 5