This may help
http://boards.cannabis.com/showthread.php?t=40868
Zandor Reviewed by Zandor on . temp probe hi ppl i was just wondering where in my grow room should i place the temperture probe on my primair system to get an accreate reading. i mean should it be at the top of the grow room, bottom of grom room, under the lights ect...ect any help would be great......... Rating: 5