^ 5500k to 6500 k best for veg and 2700k - 3000k for flower. like he said. i have 6 lights 2 are 6500 2 are 5700 and 2 are 2700 I will be using these til the end . https://www.rollitup.org/indoor-growing/347124-help-please-all-advice-welcomed.html If you care to take a look for reference or to...