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.