I have 4 sf 1000 3 of them are the most resent upgraded model and 1 of them is the old one. The new ones have a evener ppfd spread. Man I can tell the two apart by my quantum light meter. Hot spots on the older model. I like mine and I took the controller of the tops and I am running them outside the tent. It is very simple to do. videos will help you out on youtube if you need them. With an exhaust fan You can better control your temps  I like the dimmer control because I can adjust and I use mine from start to finish. No need to buy other lights for the seedlings. It took me a couple of grows to figure them out. I like mine. Enjoy