Ive had great luck with using 80 / 20 percent 2700k / 6500 k for veg then switching to all 2700 k for flowering, i use 100-300watt cfls the bigger ones help with heat rather than having a shit ton of 100 watters or less, in actual wattage 450 plus 55,000 lumens youll get with a 15 bulb set up