This is my 3rd indoor grow, I purchased a Black Dog 400 and I'm also using a viparspectra 450 (210 watts) I have this lights almost side by side in a 4x4 tent in fox farm soil smart pots and growing 4 vanilla kush temp with lights on 82° and lights off 74° with humidity around 50 percent and they are almost 3 weeks old they get watered the same at the same time and same amount but the two plants almost directly under the viparspectra are healthy growing plants the two directly under the Black Dog aren't so healthy and are slow growing I think I had the BD light to close at 27" so I moved it to 30" and no change i emailed BD they said use their hanging height calculator on web site and if the plants aren't rooted to put the light at 40" so it's at 38" and no real difference i started the plants by seed in the smart pots at first everything was fine at 27" until week 2 what I'm i missing is the Black Dog light that strong BD charts say in a 4x4 the hanging height in veg is I think 21" or 29". I got 2 pictures one of the health plants under the viparspectra and the other unhealthy plant under the BD the only nutes I'm using so far is fox farm big bloom. Thanks for any help and suggestions I'm pulling my hair out!!!! Bob