I talked to Kevin one time...
and he said his Lemon line of Pastels had dark black, which means very little blushing. The nicer blushing lines are from Graziani. Unless you buy it straight from NERD, I would question the validity of any Pastel that claims it is a Lemon, unless it is neon yellow and dark black. I firmly believe that no "line" other than the Ruppel line is worth a premium. If I was buying Pastels, I would buy based on the look of the adults that produced the one I am looking at or based on the look of the one I am looking at.
I would love to see someone buy a nice CH Pastel and breed it to only light colored normal and after 5 or 6 generations, see what they have.
Dave