6500k for veg (blueish white light)
2700k for flower (reddish yellow light)

Here is a site that explains diffrent lighting and color http://progressivegardening.com/plantgrowinglights.html

and here is a tek I started with http://www.totse.com/en/drugs/mariju...sgu191283.html

but that is JUST a start!
Hope that helps a little. Sabrina
Bree1978 Reviewed by Bree1978 on . 6500k vs. 2700k ok, ive been reading a lot on cfl growing and keep getting mixed responses on which light color is best for vegging and which is best for flowering. Is it 2700k and 6500k for flower, or vice versa? Or is there a better color for either stage? Rating: 5