Ones upon a time I surfed on the cannabis boards and found a good way of growing by Tranoble, but unfortunately I had only 10k $ for the room build up.
I couldn't offer humidifiers, air heaters and coolers CO2, and suspicious electricity bills from hps. So i decided to invest most of the money in to building energy, spectrum efficient lightining.
Light spectrum info i used was evaluated throug scientific experiments (if you search my topics you shurely will find) carried out by some farmer univercity back to early 1990s.
I have assembled led pannels using that data (30 blue, 20 green, 50 red)
So now I have several LED pannels.
One pannel is 45x75x3.5 cm approx
76 watts 100% PAR
40 Celcium max temperature
2.5 kg weight with 12v adapter.
Plants grow healthy in usual soil from my grannys garden. 10 mother plants give 20 healthy 5 inch tall clones every 2 weeks.