See, this is the problem. You keep saying they're getting the "par" they need. Do you understand "par"? Cause I don't. It's just a term growers throw around while 1 out of 10 knows what the fuck it means. I just know good results when I see them and you ain't got em. Sure, your plants "exploded" but that's just because your previous light was probably even worse. Your plants are still really small for their age.
I did read up on the light. It's a cheap Chinese blurple. I used to grow with one just like it. It sucked and I bought a 315CMH and regret ever wasting time on that crap blurple LED. I mess with some QBs from HLG and Spider Farmer now too and they're solid.
Everyone is saying it's not 2000w because plain and simple, it's not.
But honestly, forget about the damn light. It will be fine for a first grow, it's just not great.
Your problem, and the reason your plants don't look healthy is YOUR OVERFEEDING THEM.
You will kill them, herm them, or get a shitty harvest if you keep ignoring that fact.