[GNick55]

Cycle the Intensity of Grow Lights for better Plant Response

oklahoma-cannabis-company.com

 

[trustyagut]

maybe your 600 is 800

Ppfd is at 800 now, pulling 600w from the wall.

 

[7munkee]

Ppfd is at 800 now, pulling 600w from the wall.

I'm at 22 days flower and I measured mine tonight before lights off.
It's at 1150 in the center and 850ish at the edges. and my plants seem to be taking it fine. Of course, my temps are up to high 80's and I know my ambient c02 runs like 900, my grow bro lets me use his co2 meter in exchange for the use of my ppfd meter. So YMMV. I'm fairly new (3 yrs) at indoor growing so don't rely on my current experience.

I just have to figure out when to start lowering both light and temps. I asked Jeremy on Discord, I'm hoping he'll answer it on a Faq.

 

[trustyagut]

I'm at 22 days flower and I measured mine tonight before lights off.
It's at 1150 in the center and 850ish at the edges. and my plants seem to be taking it fine. Of course, my temps are up to high 80's and I know my ambient c02 runs like 900, my grow bro lets me use his co2 meter in exchange for the use of my ppfd meter. So YMMV. I'm fairly new (3 yrs) at indoor growing so don't rely on my current experience.

I just have to figure out when to start lowering both light and temps. I asked Jeremy on Discord, I'm hoping he'll answer it on a Faq.

Appreciate the info mate. Possibly I can keep it creeping up a little over next week or two but will see how they look in a couple days.
My ambient c02 is only around 400, how is yours 900?
How high is your light from canopy?

 

[7munkee]

I have a 10x10 bedroom and my tent stays open all day. I'm retired and disabled so I sit in my room on PC a lot with my Shar Pei sleeping on the floor. She is probly 70 lbs. I pretty much suck on dry herb vape all day playing Civiliztion V and trolling on X.

My lights are about 12 inches from my plants. They stretched WAY more than I bargained for and my light is almost to the top of my tent.

 

[trustyagut]

Ahh Gotcha. I've since moved house so the grow room is in a vacant house now, only get to check them for around 30min or so a day. Not ideal but do what we gotta do. Actually I'm here right now as the dehumidifier and inkbirds went offline awhile ago, so came for a quick look but the power outage was all over by the time I arrived as everything is up & running again. Environment is stable, maybe an hour outage by the looks of things, glad I switched to lights on at night, as there's been some outages during the day for a few weeks now. I'm not familiar with that game, I will look it up when I get back home. I'm retired from injury so have time on my hands now.

 

[LoveGrowingIt]

The reflective surface insides reflects more when it's closed that's all

The difference is obviously due to reflected light. There will be less reflected light when the door is open, and the meter reading will be inaccurate. So, taking a light reading with the door closed is closer to the plant's actual environment.

 

[7munkee]

The difference is obviously due to reflected light. There will be less reflected light when the door is open, and the meter reading will be inaccurate. So, taking a light reading with the door closed is closer to the plant's actual environment.

I cant see the mylar reflecting more than a few percent, so the difference should be negligible.

But hey, to a grower every photon counts, right?

 

[LoveGrowingIt]

Cycle the Intensity of Grow Lights for better Plant Response

oklahoma-cannabis-company.com

Thanks Nick.

When they changed from 18/6 to 12/12, they doubled the power from 300 to 600 watts. So, the DLI stays about the same after the flip. I've thought about this and have been increasing my light after the flip, but I've done it gradually over several days. I have a plant vegging in a 2x2 that'll flip in a few weeks. It's sativa dominant that stretches a lot, so I'll watch to see how doubling the light affects the stretch.

 

[LoveGrowingIt]

I cant see the mylar reflecting more than a few percent, so the difference should be negligible.

But hey, to a grower every photon counts, right?

I noticed what I thought were non-trivial changes when I compared readings, but I'm sure that depends on the size and shape of the tent, and probably matters more in smaller tents. It's just something to think about. I've experimented with light meter apps, but don't use one. I try to read the plants and adjust the lights using a wattage meter at the wall outlet.

 

[7munkee]

Before I got my meter I would just use manufactures suggested distance. It usually kept the leaves praying as long as temps and rh were decent.

 

[7munkee]

Thanks Nick.

When they changed from 18/6 to 12/12, they doubled the power from 300 to 600 watts. So, the DLI stays about the same after the flip. I've thought about this and have been increasing my light after the flip, but I've done it gradually over several days. I have a plant vegging in a 2x2 that'll flip in a few weeks. It's sativa dominant that stretches a lot, so I'll watch to see how doubling the light affects the stretch.

Thats they way I've done it the last few grows. Like every 3 days I'll turn it up a notch.

 

[GNick55]

Thats they way I've done it the last few grows. Like every 3 days I'll turn it up a notch.

anyone read it all?
that article is not about just increasing but also decreasing..