I use them , I have 4 sf1000 in my 4x4. Never had a problem , looking at their 5000 series now. I have one older 1000 and have noticed the new ones put out a little better ppfd. I have not tried any others
In my opinion you got the ideal setup especially if you grow multipule strains, with the 4 lights you can adjust the height and/or dim them as needed
