the best results i i have got was with purple elephant under 1 1000watt mh during veg then switched to a 1000 watt hps and 240 watt 6band led 3 300 watt cfl's and follower humbolt's recomendation on nuitrents and happy frog soil with earth worms and bat guano veged for 45 days to about 2.5 feet...