I would switch 2700k and if you can, continue using a smaller percentage of 6500k. I believe you said you are running 4 tubes and if that is the case I would use three 6500k and one 2700k. PM Muddy if you want an experts advice, I am mearly trying to repeat what he has taught me. You are going to do just fine. About 6 weeks from now you will have your reward.