Each 4 COB water cooled module cost me almost $400. I have an embarrassing number of them lol.
The 4' long 250W bars cost $500. I have an even more embarrassing number of those lol
Unlike many, I'm not trying to claim my methods are better than anyone else's, I'm just working within my limitations to maximize yields.
I haven't seen many people try to grow big plants indoors, and most who did used stupid amounts of wattage- up to 10kW per plant stupid, seriously!
Lol, I'm not even close to dialed in! I think there's a lot of potential yet to be tapped. Here's a pic of a 25oz plant I grew in a 5 gallon bucket of Tupur with 900W of COB LED;