Temperature and Humidity
Remember that in vegetation we want our temps between 70-85°F and our humidity 60% and higher. When we switch to 12/12 lights we want to bring our range down by 5°F (65-80°F) and get our humidity to under 50%. Keeping our plants cooler in flowering better simulates their natural environment, and in turn.
Many growers think this helps with the aroma, and more importantly, potency. Keeping you humidity low will help prevent mold when the colas get dense and hold a lot of water.