I put up my lights about 12 hours ago and already have seen 2-5 percent growth. Its pretty amazing, I remember reading somewhere that to a certain point, most plants grow faster in higher temperatures. So I guess there is a dual effect, heat influencing faster growth as well as extremeley high lumens. Each seedling is under 2 24w CFL 5200K. Generally speaking I think it is a little risker to keep it that close, but the reward is... accelerated growth. Thanks for all the input.