Here's my tents with the ballasts on the outside of them.

HPS ran around 80 degrees light on, MH ran around 87 degrees. Not opinion, no science needed. Pretty simple observation if you have experience running both. Notice how i'm not speculating, but sharing actual living experience. I only lack the pictures of the thermometer to prove it. BTW, I only had to look about 4 or 5 posts back to find something I felt like commenting on, I'm sure I could find plenty more.

I'm done pestering with you. To each their own. If you prefer what you read and hear that's fine by me. I'll take experience every time.