Hello,  I need some help with my current indoor grow. I'm using 2 x 220w LED boards using Samsung LM301B diodes(pretty popular light these days) and burnt my plants from them being too close. I've since moved the lights up and the plants are starting to respond to it better. Have you used said lights/diodes before, what advice or lessons did you learn about the growing period, i.e. distance for the lights, number of plants grown, yield, grow space etc. would be greatly appreciated.  Th