Reydenanswered grow question 5y ago The Tsw 2000 being a good LED doesn't raise the temperature in the box, maybe by a few degrees, but if you keep the extractor and fan on, you won't have temperature issues... I recommend a humidifier for the growth phase and a dehumidifier for flowering.. Keep the parameters between 60 and 70 RH and about 50 humidity for flowering and you'll be good to go like a train 😎