Heat CMH in 4x4 tent

Ironhead1970 · Aug 15, 2022

Help with 2 315w CMH lights in 4x4 tent temperatures are running 90-95F to hot for transplants.
Run one at first maybe.

Ponky · Aug 15, 2022

You sealed with CO2 or running duct fans?

Ironhead1970 · Oct 16, 2022

Ponky said:
You sealed with CO2 or running duct fans?

Running a 6 in duct fan to outside the room at full speed the temp from 2 315w CMH gets above 85F only going do 2 plants a chiller is not worth the effort and hassle to get one here in my state which if it's not in hell if not you can it from here. Where everything is still illegal.

Novaracer69 · Oct 16, 2022

I would say invest in a led light. They run a lot cooler than a cmh and potentially have better par and run the exhaust fan lower.

Ponky · Oct 16, 2022

I have been very happy with an inexpensive Phlizon light. It's only 450 watts. It's pretty cheap. But yeah 85 is around the upper limit. Can you bump your humidity up to like 66% with lights on? Maybe even more

ninjadip · Oct 16, 2022

Yeah if you need to get cooler I concur that an LED light will help lower temps significantly, and I believe the bar style LEDs run even cooler than quantum boards because of their design, but either way it will help get you into that comfort zone

ritoMox · Oct 16, 2022

Ironhead1970 said:
Help with 2 315w CMH lights in 4x4 tent temperatures are running 90-95F to hot for transplants.
Run one at first maybe.

315 Watt CMH Cool Tube Hood Kit

Grow Lights Canada Listed Performance speaks louder than words.This UL listed Grow Light Kit simply outperforms the rest. Why buy a magnetic ballast or another light kit when for a fraction of the cost you can get better performance and higher yields.

growlights.ca

Ventilation ducting on each side of the light:

6 inch cool tube with cmh adapter (video is age restricted)

ritoMox · Oct 17, 2022

HPS to CMH adapter

ritoMox · Oct 17, 2022

Ironhead1970 said:
Help with 2 315w CMH lights in 4x4 tent temperatures are running 90-95F to hot for transplants.
Run one at first maybe.

Are you using a cool tube? Use your existing CMH ballast:

Amazon.com

Heat CMH in 4x4 tent

Heat CMH in 4x4 tent

Ironhead1970

Ponky

Ironhead1970

Novaracer69

Ponky

ninjadip

ritoMox

315 Watt CMH Cool Tube Hood Kit

ritoMox

ritoMox

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