Ok cool thank you! I had it at 16in away but the tips started turning yellow a day after so i put it to 20in. See your all over this thread got another question. I stunted my plants by watering to much first 2 weeks so they are 3 weeks 2 days now and only 6in tall. Growing good now other than needing fed. How much bigger do you think they will get? They are auto bubblegum "supposed" to be 55-65 days. And gorilla glue which is same.