Well, I guess you can assume what you will as far as my experience goes, but I did'nt learn what I know reading High Times lol. Your MH bulb type (enhanced or standard) would definitely have a big impact as well as your hood type and ventilation along with many other factors. I don't think there is a HUGE spread in the first place between the heat output of HPS & MH and it's a good debate on which bulb is "hotter" or radiates more heat but simple science proves that more light = more radiant heat. the HPS is proven to make MORE LIGHT, so you do the rest of that equation. What we have you saying is one thing and no real evidence to back it up, no pics of temp readings just you using "evidence" to support your side that really is not evidence because you don't have the real information.

I was going to just rank them as "HID" to keep it simple but since the other rankings all broke down HPS, MH, CFL, LED (and you don't seem to want to debate any others of them) I figured I would keep it the same and seperate the HPS/MH. Bottom line is HID is way hotter than LED and I think we can all agree on that. From my experience HPS is the hottest light source. Maybe your experience is different but that's okay because that's not really what this thread was about in the first place. You found a post of mine because of our "discussion" in the other thread about the lumigrow light and tried to come into this one and discredit me somehow, someway. The truth is I actually do know what the fuck I'm talking about. Believe it or not.