Some great advice and obvious that you've done some homework on this. It's a huge playing field and there are many vendors more than willing to take your money and run, caveat emptor (buyer beware). That said, there are some respectable lights out there for the money and as Edge said, we are growing weeds, it doesn't have to be complicated, nor do you have to be a brain surgeon to grow them. Personally I've bought some of the LG's and for the money I'm happy with them, but I'd have no problem calling a spade a spade and moving on if they didn't work. I have 2 of those (crap) panels as well... live and learn.
Thanks. I've spent a lot of time and resources in the last 6yrs. playing with leds so I've had my fair share of being suckered by a lot of these bs in this business. I think there's an intentional spin that's generated by the bad guys in this business to convince us it takes extra expertise and bells&whistles to grow our girls. Yes, every plant or strain for that matter, will have different characteristics that must be learned in order to maximize performance. But at the end of the day, our girls are just another plant species that need the same basic elements to reach full genetic potential. It's not that complicated, if u can grow tomatoes, u can grow our girls with the same thing and nutes. Like I said, I'm not here to promote anything particular product rather just passing my actual hands-on observations for people to utilize it for whatever purposes.