I actually bought the LED's thinking it would lower the temp in the room, and I'm actually running warmer than when I ran HPS. Muc h of the electricity savings is eaten up by having to run a dehumidifier in flowering, to control humidity. I am saving on bulbs, usually bought twice a year but the value is the even light spread with no heat spots. Every light has some advantage and disadvantage. $1300 cost for each Gavita is an initial expense for sure but I recoup it in 1 grow many times over.