Ideal light temperature spectrum for flowering is 2700 Kelvin and ideal for vegging is 6500 K. It seems that many metal halide bulbs sold for growing tend to be in the 4000 - 4200 K range which is probably fine for flowering but an HPS would be optimal. You can find HPS Conversion bulbs (360w I think) that will work with a MH ballast but they are pricey...$50 and up. Many people use MH (or HPS) for entire grows with great results so if cash is an issue, just go with what ya got and have fun.
doco Reviewed by doco on . Do you see what I see? I've been patiently waiting to determine the gender of the plants I have. I've taken some pics, I can't tell if its my camera or what, but I can't seem to get a great close up on the nodes. I'll attach 8 different pics from both plants to see if anyone sees anything on them! Thanks for your help! Here's the first five pics! Rating: 5