I grow in a grow room, not a tent or cabinet. I have 5 Viparspectors over 12 autos, and 4 young photos, and all are well. I've been using these lights since day one, 2 1/2 years ago, and will definitely stay with them. All my plants have dense sticky large buds, and aside from my mistake last year of not flushing my photos prior to moving them to 12/12, I've had very very good success with all my grows, I move the lights up according to what they need.
My very young seedlings are sprouted with a t5 light, and then I move them to the 5 x 6 table where the big girls are, and I have these lights 36 to 38 inches above them, where as the others are under the lights at around 24 inches or so. The lights are all on pullies, and are hanging from a large wooden rack built specifically to hold these lights, with dozens of hooks in the rack to allow me to move them where ever I might need them.