Started out with one of these (the 2000W version), it made a huge difference , noticeable from the red and blue phlizon I was previously using (600W red and blue).In total I ended up buying THREE 2000W versions. using one in my flowering tent, one in my veg tent, and my wife is using one for regular plants.If you're growing in a tent, you should never need to go above 7 or 8 setting. Full blast on this light needs to be on the ceiling of a room. It's really bright. Maybe not as bright as one of See full review