I solved the 50's on one side of the room by opening my inlet for the central air but behind a blanket. It keeps the air from crossing the room so quickly and it mixes with the intake air. Room is 65 now and raises 70 > for an hour before lights out at 12 noon.

Not scientific but... For now it works, after harvest I rebuild my intake system, add a/c for this coming summer and put my light fan on an thermo.
LAmike Reviewed by LAmike on . Growing in Southern Cali, pointers from locals? I am having a hard time balancing temps still. I don't like drastic temp changes. What are others doing to maintain temp in the Southland? It is easier with the 1000w HPS bulb. Room 12'x16' (Will enclose smaller after harvest) Cooltube (Duct to attic is completely off right now to maintain temp) 1000W MH conversion bulb for HPS socket. (Runs really cool) Box Fan in window with an A/C vent to block the light. Minimal actual pull from box fan maybe 200CFM makes it through. House Central Rating: 5