Hey Crusin.. It can often be hotter at the TOP of the canopy because that is the closet point to your lights...

It is GREAT to have a fan blowing directly between your lights and the foliage(canopy)... at a slight angle upward.. This will help keep the canopy temeratures and room temperatures the same... 75-82 degres is GREAT!

and NOW you KNOWM
Garden Knowm Reviewed by Garden Knowm on . Temperature at plant top I have read loads of temperature posts that for the most part address ambient air temperature in the grow room. I believe the temperature at the plant-top level would be somewhat higher than the "room" temp. Has anyone any information on the temperature is as the level of the leaf? Thanks, great forum. Rating: 5