I can help you guys setup quantum boards for less or around $1 per watt. Four qb120 or qb132 boards sold on amazon (out of stock now) 480 to 600 watts will do a 4x4. I’m going to be testing their new light out soon too, the qb96 elite V2 engine. It’s a COB style qb that packs quite a pilunchbwith reds and far reds for flowering. 2-4 can provide the wattage for a 4x4, but not sure about spread. I’ll be trying two in a 2x4. Bit I can guarantee these an setups will blow any blurple away, for just a bit more $$$.
Thanks for the info, I'm in the u.s and electricity in my area is expensive, I'm plannings a alternative method tho, it will be a greater up front cost but i think it will be worth it in the end