Right now they are under a 400 watt HPS, but I will also turn on the 1000 watt HPS when I force flowering. I have some other strains that I grew along with the purple kush and the other strains where all taller, but I never looked into the purple kush strain to know it was suppose to be short. The guy I got the strain from has a lot of diff. strains and has a pretty big opp.(it's legal though he is a care giver.) He told me it was purple kush, it was by far my favorite strain out of what I got from him so I continue to grow it. I too have trouble finding how to subscribe. Good luck and thanks for you input!!
By the way the big plant in the picture. It has been vegging for a while. It was involved in a moving of houses and I wasn't gonna just flower one plant so I let it veg... Kind of an expierement as this is only my third grow.