Hey! Whats up I just received my brand new 400wtmh and I was wondering how high i should put it? The plants are pretty established. About 3 weeks old. I've heard put your hand on the top of your plants if its not uncomfortable your ok. Is that true? That concentrates the light into a small area. My plants are HK and AI in an ebb and flow tray. About 6" in 8" mesh pots filled with hydroton. I have pics, but cant figure out how to get them on the site. Ok well watever input I get on the lights! thx
