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So you measured the HPS light from outside the glass/heat shield and the CFLs just next to the bulb with no glass/heat shield? Sorry if I misunderstood anything you said, but if I'm not mistaken, this seems rather pointless in the sense of proving that HPS run cooler than CFLs. I'm sure if you...

You can put a hole in the bottom section of the boxes and then put another one or two near the tops and just put fans in those tops holes. The negative pressure will suck in air through the bottom hole.

I've read you can get 9-12 plants per square foot in some cases, it just depends on how tight you pack the plants if you're doing a SOG grow.

If you mean something like "1 Part A, 3 Parts B" it's just a simple ratio of 1 part of substance A, for every 3 parts of substance B. It doesn't matter how much you use, just like 3 gallons of water to 1 gallon of anything, or 300 gallons of water to 100 gallons of anything, it still maintains...

I would re-pot it and bury it up to the bottom-most leaves and put some lights on it as close as possible. That would be the best bet to combat a long, spindly stem at a young age.

I just had a question about CFL lumen and color temp in respect to one another. I know that the higher the color temp (6000K, 6500K, etc) is always better, but some lights I'm seeing online had a lower color temp, around 5000K and put out more lumens. Now, I know that more lumens means more...

I was assuming you got the light from Wal-mart just from hearing about the problem you're having with it. I had the same exact problem with one of my shoplights I picked up from there. I tried to mess around with my light but nothing worked so I just returned it. It sucks and it's a hassle, but...