Garden Centers & Hydro Stores I always say tomatoes. The guy at my hydro shop gave me the funniest look when I told him i was looking for a 400w hps for afew tomato plants, he knew exactly what i was growing, but it helped me out after we started talking about "fatter, more dense tomatoes" with hps lol. Told me about cloning, adding cfl side lighting, the whole time using tomato code words. Was pretty funny & helped me out alot. I would assume most hydro stores grow but i have no idea