I used to use T5HO (switched to LED) and I'd use 6 3000K bulbs and 2 6500K bulbs. Nice happy colas. Keep the lights about 3 inches from the tops of your plant if you can do it and keep it cool. Four 3000K bulbs in the center, put the two 6500K bulbs in, one on each side of the center four, and finish off with the last two 3000K on the outsides.
khyberkitsune Reviewed by khyberkitsune on . T5 HO Flowering Questions my first grow; I have an eight tube 4' t5 HO sunblaze that allows the switching of either four or eight bulbs to be on. I have eight plants that are doing extremely well. About 6-7wks old. History: mexican strain grown in FFOF and guano, kelp, superthrive tea every other feed up til now. Kept at 80 degrees day, 70-75 at night on 20/4. I can't beleive it but out of 12 seeds eight appear to be fems. They are rather small (8-12") but bushy and in about 2-3 weeks I want to prepare for Rating: 5