Quote Originally Posted by gbcannabis
has anyone try to flower with led? talking about the 90 watt high power UFO led. they are saying that it is as good as the 400 watt hps and produce they same yield. I just want to know about them and wonder their just crap compared to the hps
Most LED panels suck. Seriously. I design the things, and I've pulled out so much hair (literally) at the dumb crap most of the panel makers do that I truly have a small bald spot in my crown whorl.

For vegetative purposes, a 90w LED panel will do as well as a 400w HPS. For yield, no way in hell will a 90w match a 400w HPS. You need bare minimum 200w LED to start matching a 400w HPS in yield, and even then I'd recommend about 270w.