I agree with you Rick. It depends on your coverage too the closer you are to the canopy the weaker the coverage. I don’t use a tent so I have plenty of height room so at 27” above canopy at 100% I reach my 1000 PPFD and 850 on the edges of 5x5 space at 16” I have to dim it to 70% because it draws 860 at 100% but then the comers drop to 5-600 PPFD.