LED technology is at it's infancy at this time and looks very promising. I have seen and smoked herb that was grown under LED's and it was good herb it just took longer to grow. I personally won't invest any money into LED's for a few years but once they develope the LED panel that is equivalent to 2000W HPS or MH I am down, for sure. I have seen the slow growth of an LED and am very pleased with my HPS so until LED's can give me tight monster buds I am sticking with my HID setup. Good Luck to everyone, whether you use HID or LED, because in the end we are all smoking herb and that is all that matters