Brief summary:
At the moment, I am using 3 HID lights: 2x 1000W HPS, 1x 600W MH. The 2 HPSs are for my flowering tent (8ftx8ft), and the 600W MH is for outside the tent (small area, still the same room as the tent) for my Veggeing unit and cloner (in some distance).
The 2x 1000W are cooled...