I love my (2) XS1500. I got a 2000 as well, it is not as bright as the 1500. To do it over I would have 3 or 4 of the 1500. They all have a dimmer knob with instructions for distance and power output.first i'm getting an xs1000 to start some seedlings and then to keep some clones. i think.
I read the intensity of my lamps my contribute to some of the plants growing without pistils. Genetics is important but not the only thang to influence the bang.