[Nerdly1]

My comments are meant for "light tight" indoor grows only. Somewhere in the myriad of threads I read about running your lights in the coolest part of the day. This gave me a reason for "which" 12 hours of the day I'd run my 400 w. HPS.
Example:
With summer coming soon, I'm training my flowering plants to a 12/12 grow cycle, starting at 9:00 pm each evening till 9:00 am each morning. I figure I won't be fighting so much heat as in the daytime.
Is this some obvious fact I've just become aware of or does everyone run their light cycles this way? Naturally 18/6 & 12/12 light cycles are normal, but I have been running them according to my daily schedule. Changing the schedule just seems logical and more economical.