Quote Originally Posted by Opie Yutts
Oh here we go:

...evaporating water cools the leaves below that of air temp...

http://www.plantstress.com/articles/...SI_phoenix.pdf

It's a little technical, but it's interesting and answers some questions.
LIKE I UNDERSTOOD THAT AT ALL..............

Actually I'm just parroting what my hydro guy told me (when he sold me the temp gun ) but I would trust my hydro guy with my life. He IS.....GOD. :thumbsup: