LED in veg rocks all lighting.....a combo of HPS and LED in flower will get the best yield and quality....i've grown with about every combonation from T5/HPS...HPS alone...LED alone....and the HPS/LED will be your best bet....i use 150w LED's on either side of a 600wHPS for 900w total over a 3x3 tray and have been yielding 560-610gr dry....with HPS 600w alone the yield was 330-350 and w/1000w HPS i yielded 400-445gr....w/450w LED i yielded 330-360....those are hard numbers w/same strains and nutes...you can check out my LED runs in the link in my sig :jointsmile: