If you was to have 6x600 hps lights hung about a foot or so apart would you need to hand then the same distance from the tops as say just 1 600? if that makes sense
I have a 2m x 4m grow room and have 6x600 HPS. I spece then 2ft apart in two rows. I tend to raise or lower individual lights depending on the height of the canopy of which the light is covering.
