Guys I started a thread on this in the grow journals and it barely got any traffic. I took it down. I then decided with all the bickering going on it was pointless to share, as all this shows is how these types of lights work in my garden and environment with my strains. There is no control and the same open 5x9 was used with one light on each half. I had no divider. Too many things people would bitch about. I got to see what I wanted and the results are what I expected after having compared CMH to COB in the past and favoring the CMH. My opinion is of the less popular and the thread would just end up leading to fighting and people trying to convince me how I am wrong based on data sheets and not plants.
I do not hate COB's, I have used pre built and DIY COB's. I just "prefer" the way HPS/MH/CMH grows my plants. I don't give three shits about better efficiency when the garden is not to my liking. I took down 650 watts of COB and added a second A/C 1K hps and my temps went down significantly and the plants are looking better fuller and more natural. And I definitely have a lot more light. What I can say is you need more than this amount of watts in my opinion to light half this space and get proper penetration to the lower canopy (with COB). I do not SCROG, not what I like so my light needs to reach. I will play with the quantum boards in the future after this run and getting settled in the new place.
I will just leave it at that. There are some out here trying to paint me for a troll because I have a non popular opinion based on growing with the technologies being discussed. To me COB is not bad, it has it's uses and benefits, I think more so in smaller grows (for now). It just is a fast evolving technology right now and I will sit back and let it get better. Cost is a factor for me when I consider all of these technologies too.
My 5x9 also ran much hotter with just the LED side in it, vs the 1K HPS only. I did test that as well.
This is my preference after growing with HPS/COB/CMH/T5. for veg I prefer in this order:
1) Blue MH
2) CMH
3) T5 (6500K GE Bulbs)
4) 5K COB
For Flower
1) Enhanced HPS
2) CMH
3) Blue MH
4) COB
5) T5
I flower autos all the time in my veg tent so my veg light needs to have a kick.
Happy to answer any other questions.