I have a small grow divided into two rooms that I used to light with 1KW MH and 1KW HPS. Ducted hoods exhausting to the attic. I started with magnetic ballasts and I ran a dehumidifier so things got warm in the summers. Upper 80’s F was hard to maintain. Eventually I bought a couple of digital ballasts and dropped the heat load so I could maintain mid-80’s in the summer.
Then I went on the recommendation of a couple of friends and checked out Fluence. They are expensive. $1500 SPYDRx PLUS I tried the first one out in the flower room. I have heat to remove from the room still but nothing like HIDs produced.
The quantity and quality of the flowers are better than any I grew under HID. I bought a second one of the above for the veg room.