iv used led on two grows. the first grow was 5 silverhaze autoflowers. start to finish was a 2x 120 watt full spectrum led. for autoflowers they worked great. my second grow was i got a little different. i wanted to go hid but the power bill is so expensive. i used 1x 600 watt mh hps with adjustable balance and 2x 120 watt full spectrum led. for veg i used first 10 hours of led and the last 6 hours of mh from 50% to 100%. for flower i used 8 hours led and 4 hours hps 100%.
started with 6 seeds. grew six weeks then cloned 5 of them. having 6 plants veged for 10 weeks and 5 plants grown for 6.
these photos were 17 weeks into grow. 7 days into flower.
i believe led are great for 1 supercroped monster. but they tend to stretch plants a little because they have to be so close do be efficient. its hard to spread led over a large area. not dealing with the heat and humidity as much is good to because the led dont put off anywhere near the heat as hid. the combo has worked well for me though.
these next photos show the stretch i got with those auto flowers.
what do you think? hope this helps you decide