21 day from seed flip to 12/12

Knowurhyphae said:

It's 78F @ the canopy . I can put my hand on that glass without fear of burning. I have fried buds with 1000 watt lights cause it was 98F on the glass. This is a 400 watt.
Sorry if i was a dick. i just smoked and i am not as mad. But seriously you didnt say anything that could help and all you did was criticize.

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My bad man i thought we were talking 1000w. I was thinking you had completely lost your marbles. With my hood the bulb is separated from the air that flows through it and cools it so the glass gets to like 250 degrees lol. I forget what its like running the single end bulbs. How much height do you have to raise that light? Those plants are going to get a lot taller.

Seriously only have like 6 inches to go up. If I rig something other than the pulleys I might be able to get like 11 inches out.
If I go hard on the LST or even HST a lil bit right now I can probably bring them back down another 2-3 inches.
I am thinking the soil container is my limiting yield factor Since i will not be transplanting.
Quality is also more important to me than yield.

Knowurhyphae said:

Seriously only have like 6 inches to go up. If I rig something other than the pulleys I might be able to get like 11 inches out.
If I go hard on the LST or even HST a lil bit right now I can probably bring them back down another 2-3 inches.
I am thinking the soil container is my limiting yield factor Since i will not be transplanting.
Quality is also more important to me than yield.

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Yeah thats not much space to work with.

Well I abandon the pulley system.I was able to get over a foot of headspace.So thats good. I had to attach the light directly to the ceiling so its in a final position. I also put in my carbon scrubber. I had two so i figured it couldn't hurt to use both filters. I personally feel that the 400 watt is a lil too far away now. I have some 100 watt CFLs would they be useful as supplemental light or just a waste of wattage?

get a free lux meter app if you have a decent phone. will get rid of the guesswork of figuring out height.
I agree that having the glass can allow you to keep the light closer but they are pretty hot lights. goodluck

Thank you for the tip, i'll d/l a lux meter app. I have a light sensor the reads " high intensity" at canopy level.
I don't think there is guess work. As long as the temp is right you want a light a close as possible, while still being in the direct footprint of the beam.
My canopy temp is 72F atm.

the lux meter should read up to 75k lux, 25k for veg and 50k for flower is good

Knowurhyphae said:

Thank you for the tip, i'll d/l a lux meter app. I have a light sensor the reads " high intensity" at canopy level.
I don't think there is guess work. As long as the temp is right you want a light a close as possible, while still being in the direct footprint of the beam.
My canopy temp is 72F atm.

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some light sensors are designed for photographers, is this for horticulture?

hmm its says 10,240 3 inches away from the 400 watt bulb. Also reads 10240 underneath the canopy.
The light reader I was using previously is a probe for temp/ ph and light.
I wasn't confused before but i sure am now.
Are 400 watt HPS bulbs just that shitty?
Would a pair of100 watt CFLs be useful as supplemental light or just a waste of wattage?

Knowurhyphae said:

hmm its says 10,240 3 inches away from the 400 watt bulb. Also reads 10240 underneath the canopy.
The light reader I was using previously is a probe for temp/ ph and light.
I wasn't confused before but i sure am now.
Are 400 watt HPS bulbs just that shitty?
Would a pair of100 watt CFLs be useful as supplemental light or just a waste of wattage?

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If it reads the same 4 inches away as under the canopy its not reading right.

Well according to Jorge cervantes a 400 watt light should be 18 inches from the plants. So i think im good at 14. Either way the lights not moving anymore. 3 differnt free lux meters say the same thing so the sensor on my phone must be too scuffed up to get a correct reading.
At-least i dont need to LST every night now. I put the CFLs in.

I used a friends phone and the readings average about 50k with a range as low as 35 in the corners. 3 inches under canopy im getting like 20k.
Directly under the cfl im getting 65k.The two cfls add 6℉ each to the 40 cubic foot grow tent. Bringing my temp 84 at canopy level.

Knowurhyphae said:

I used a friends phone and the readings average about 50k with a range as low as 35 in the corners. 3 inches under canopy im getting like 20k.
Directly under the cfl im getting 65k.The two cfls add 6℉ each to the 40 cubic foot grow tent. Bringing my temp 84 at canopy level.

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35-50 is just fine for veg. 75 is the upper limit for flower. 84 is pretty warm that means your leaf temps are likely 90+

So this brand new 400 HPS is a piece of crap. Im just gonna order a 1000 watt dimmable.
Am I 100% just wasting my c02 at this moment.

Knowurhyphae said:

So this brand new 400 HPS is a piece of crap. Im just gonna order a 1000 watt dimmable.
Am I 100% just wasting my c02 at this moment.

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No man your light is fine.

Knowurhyphae said:

So this brand new 400 HPS is a piece of crap. Im just gonna order a 1000 watt dimmable.
Am I 100% just wasting my c02 at this moment.

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co2 is a waste for almost any hobby grower. Kill the cfl's and just have the the hps running at 72 degrees is perfect. 35k-50k is just fine for veg. Hell its decent for flower.

Dimming a 1000w light kills its efficiency. You could bump up to a 600w bulb/ballast but i think that would be overkill.

From what i read you actually want your leaf temp around 88-90 when using c02 to excelerate evaporation and boost metabolism.
Can you please elaborate why C02 is a waste when used correctly? Do you think most hobby growers cant dial in their grow rooms? C02 is extremely cheep after the initial investments.
You say im fine for veg but i'm two weeks into flowering.

Lumatek has a 400 watt bulb for $60. They claim is 17% more efficient then than cheep bulbs for $12. Could they possibly be worth the extra 50$?

Knowurhyphae said:

From what i read you actually want your leaf temp around 88-90 when using c02 to excelerate evaporation and boost metabolism.
Can you please elaborate why C02 is a waste when used correctly? Do you think most hobby growers cant dial in their grow rooms? C02 is extremely cheep after the initial investments.
You say im fine for veg but i'm two weeks into flowering.

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35-50k is fine for flowering. Is your tent completely sealed? If you dont have a completely sealed grow area, co2 is just going to the rest of your house or wherever... From what i understand dialing in a sealed grow area running co2 is not easy. I pull 1.3 grams per watt from HPS and organic soil. No co2. From what i understand, only a large scale grower is going to see a good return on investment from running co2.