It's true. They are much closer to the light with a cool bulb. They would have died already if you had an HPS/MH that close to them.
Because of soil fertility, I probably wouldn't feed for another 2 weeks. The leaves look large and green for their size.

Now go look at the difference between your plants and the plants in that other thread at 2 weeks. I was trying to point out to the readers that they would NOT get their plants like that in just 2 weeks. He was not being honest with us. Good Luck with your grow!!!