Temp drop when light is off

Hey JibbyJack! A 10-degree drop during the dark period is actually quite normal and often even beneficial for your plants. Looking at your data, dipping down to around 67°F is perfectly safe for hardy strains like White Widow and Purple Haze it can even help bring out those beautiful purple hues in the Haze as they mature. Most plants enjoy a cooler rest period, provided it doesn't consistently drop below 60°F, which is where growth can start to slow down. The most important thing to watch is your humidity; as temperatures fall, relative humidity usually spikes, which can increase the risk of mold or mildew during the late flowering stage. Keep that airflow strong during the "lights off" hours to keep the environment stable, and you'll be just fine! Happy Growing Growmie🌱