My Covert Covid Cannibis Closet

The boredom from the 'rona got me to get back into growing after several decades. A little rusty and new to some things such as LED lighting. Any constructive input on my setup? The only issue I'm really dealing with currently is that the humidity gets into the mid 60's during the nighttime. I'm thinking my humidifier is just not able to keep up with it's environment. Plus the entire rrom has always had an issue with being somewhat moist.

I'm running several ac infinity products for ventilation including their 6" exhaust fan (7 setting) which blows outside my garage

Room is non-sealed. It sits behind three large sliding mirrors

It's being lit by two Mixjoy SF1000 knockoffs, and a Yehsense 1500w (~265 actual watts).

Humidifier is rated for 150sq ft

Grow area is 2x4x5

I have a small heater that I am going to place behind the intakes to pump in warmer air during the night, as temps get down to 64f occasionally in the grow area. The heater will be controlled by a thermostat probe placed in the where the plants are.

Thermostat is located slightly below the oscillating fan out of its path of air movement.

I lightmeter'd it using a phone app called Korona. Seems to put the PAR values roughly in line with what the manufacturers have advertising them as being at heightwise.

I assume you mean dehumidifier?

Your night time heater will help stop the spike in RH to a degree.

Other than getting a bigger dehu for the whole room I would just make sure you have plenty of air circulation.

Is your total wattage 265 or is that just the Yehsense?

Looks good! The outtake fan may have benefitted from being a bit higher but shouldn't be a problem if you aren't getting super high temps. Just make sure there are zero light leaks at night. Go into the area and make sure its pitch black since it's not closed off.

coreywebster said:

I assume you mean dehumidifier?

Your night time heater will help stop the spike in RH to a degree.

Other than getting a bigger dehu for the whole room I would just make sure you have plenty of air circulation.

Is your total wattage 265 or is that just the Yehsense?

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Total wattage for veg is somewhere around ~320, and then ~450 once I flip on the other switch for flower. The SF knockoffs are rated at 110 each, but I dimmed them a touch, and the Yehsense is rated at 265 when both flower and veg options are active. I assume wattage is halved when only vegging is selected.

The space heater is coming today, so I'll see how it goes, but I'm thinking a bigger *dehumidifier* is still going to be needed as well. (not sure why I can't edit my OP)

Greenthumblady said:

Looks good! The outtake fan may have benefitted from being a bit higher but shouldn't be a problem if you aren't getting super high temps. Just make sure there are zero light leaks at night. Go into the area and make sure its pitch black since it's not closed off.

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I jumped inside prior to adding all the equipment and added a bunch of weather stripping to get it as dark as possible. Is pitch darkness imperative for veg or just flower? I figured once it was time to switch cycles, I could just tack a sheet of panda film over the front behind the mirrors and add a zipper or magnets to it for access in order to ensure no light leakage. I'm still in there quite a bit dialing things in, so I like the convenience of not having another wall to move around in the meantime.


Thanks for the feedback, I have also since dimmed the two lights on the sides to match that of the yehsense in order to even the canopy a little more. They also have all been lowered by about four inches as well.

Its MOST important during flower but if possible do it asap. Light leaks cause stress which often results in the plant hermie-ing. So best to get the setup 100% right away to give yourself the best shot of a successful harvest.
Also to help w humidity clean up that space under the plants. It's just stuff for moisture to cling to.

How many CFM's should my exhaust be pushing? I have about two feet of tubing and one 90 degree bend to move it all outside.

SF220 said:

How many CFM's should my exhaust be pushing? I have about two feet of tubing and one 90 degree bend to move it all outside.

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To me, it's mostly about maintaining good temperature and humidity. Many say the air should be exchanged x times per hour, but opinions vary wildly and they can't all be right. At times, to keep temperature and humidity up, I've used very, very little airflow and growth was just fine.
Air movment around the grow is important.

Under LED, you want temps around 27-29C and humidity is important. I use the second chart on this page.