I tottally disagree. These guys have no experience, I do. The grow lights you get at walmart are 7800k and they are awesome and make your plants grow bushy and healthy with the nodes close together. I got 4 of em and use to vegitate 3 to 4 plants. Then flower under 400w hps in a mylar tent. Ive been searching for a large light system using 7800k but Im still searching. I figure if you used both 6500 and 7800 it would be even better.