Lighting Light intensity for autoflowering plants (lux)?

[Srfr]

I've also been trying to nail some ballpark numbers for autos. Just somthing to help me confidently get dialed in. I've done quita a few runs under LED now but still learning obvs. I've done a fair bit of searching and come up with this chart below. I'm only on day 18 and things are looking very good. My plants are only getting 14.5k at this stage which gives a DLI of 18. I'm told the chart is very conservative so I expect to push my plants a bit harder than the chart shows. My seedlings are looking the best yet and I've definately been hitting them too hard too soon previously. Please dont rely on this chart but fee lfree to give feedback if you have found some good numbers. This is based on my 250w, CT:4000, Unit Farm version of the SP250 on a 24 hour schedule (it's cold here and I need the heat). I've posted this elsewhere but I used this calculator to convert my LUX to ppfd: https://horticulturelightinggroup.com/blogs/calculators/converting-lux-to-ppfd I selected the 4k calculator (colour temp). I also used this calculator to work out the DLI: https://scynceled.com/technology/dli-calculator/
So I'm making a lot of assumptions and I'm willingly inviting criticisms/suggestions on this.

 

[low_and_slow]

20-30 should be fine for your seedlings, and cannabis is fairly unique in the plant world that it can take radically high DLI early in its life if all other parameters are in check. 40-60 is the goal for max yield, and that's not just in flower. The beauty of autos is that you can get high DLI without super high PPFD because you can run the light for 20 hours per day or more.

 

[Grisbi]

Hello guys, i need your advises :
i have beetween 900ppm and 1300ppm co2 in my appartement i would love to grow in tent
what is the maximum par/ppfd would you recommand to put with my led during the differents cycle of the autoflower pliz?
i have an apogee par meter so i would love to push it to the limit
thank you, best regards

 

[Death The Cultivator]

Hello guys, i need your advises :
i have beetween 900ppm and 1300ppm co2 in my appartement i would love to grow in tent
what is the maximum par/ppfd would you recommand to put with my led during the differents cycle of the autoflower pliz?
i have an apogee par meter so i would love to push it to the limit
thank you, best regards

Aim for 60+ DLI.

Is that ambient c02 or do you have a method to control it?

Also which light do you have and which par meter?

 

[Couch_Lock]

I'm of the opinion common sense is as good as a LUX meter.

Max out your lighting and keep it 40 inches from young seedlings and early vegging plants.......Your plants will do ok. They will grow up to the lighting. But this method requires intense lighting.

 

[Grisbi]

Aim for 60+ DLI.

Is that ambient c02 or do you have a method to control it?

Also which light do you have and which par meter?

hello sir,
- so i have home made led grow light, did with cutter led strip 3 channel, have 2 kind of strip , so 6 channel tunnable
i made 2 structure with 5 led strip each, structur size : 60 x 80 cm
channel 1 : nichia 757@ 5000k 97cri, 1w/led max, 96 pieces /strip
channel 2 nichia 757@ 2000K, 1w/led max , 96 pieces / strip
Channel 3 : cree xd16@ 3500k , 6w/led max , 12 pieces/strip
channel 4: cree xpe2 660, 3w/led max , 12 pieces /strip
channel 5: cree xpe2 730, 3w/led max, 12 pieces /strip
channel 6: uv uv uv

everything works with 2 driver, one meanwell 600h48a for the white and 200 watts meanwell for the colored led , everything controled by bluetooth mesh via illumi meshtek
each strip can go up to 120watt but i will push them at 50/60w maximum i dont need that much, and i wanna put the accent on efficiency + thermal control dissipation
gonna putt some 200mm noctua pc fan on each structure

- i also bought long time ago an apogee sq520 for light mesuring

- for the CO2, its ambiant, i live in a big tower in the city, i was shocked when i measured the co2 concentration in my flat..... even on the balcony its 800ppm co2
i think its from the general heater from the bulding + pollution....
but i think for plants its great no?


i checked on https://scynceled.com/technology/dli-calculator/ to see what 60 DLI represent, i was nicely suprise, i can go @500/600umol/m2 on veg and 1000umol/m2 , its gonna be the fire on the tent my friend

ps2: im so in love with the nichia 5K 97 CRI mixed with nichia 2K spectrum, its like the sun i let you picture of the spectrum as well
have a great day

 

[low_and_slow]

That much CO2 is a direct pollutant and risk to health, tbh. I'd recommend you grow a bunch of aloe and spider plants indoors in addition to cannabis, you need some kind of biological scrubbers. 900-1200ppm is like the target for an enrichment system, if you have that naturally plants should blow tf up!

 

[Grisbi]

That much CO2 is a direct pollutant and risk to health, tbh. I'd recommend you grow a bunch of aloe and spider plants indoors in addition to cannabis, you need some kind of biological scrubbers. 900-1200ppm is like the target for an enrichment system, if you have that naturally plants should blow tf up!

yes i know that seems crazy that high level of co2..... i cant close windows in my appartement otherwise 3 hours later C02 increase up to 1400 ppm ....
co2 record have been done after a cooooold winter , couldnt open windows.... i was at 1800ppm ....
cant wait to see how sumer will be without the freaking general heating from my building....
im gonna follow your advise and try to find looot of depoluting plants

 

[Death The Cultivator]

hello sir,
- so i have home made led grow light, did with cutter led strip 3 channel, have 2 kind of strip , so 6 channel tunnable
i made 2 structure with 5 led strip each, structur size : 60 x 80 cm
channel 1 : nichia 757@ 5000k 97cri, 1w/led max, 96 pieces /strip
channel 2 nichia 757@ 2000K, 1w/led max , 96 pieces / strip
Channel 3 : cree xd16@ 3500k , 6w/led max , 12 pieces/strip
channel 4: cree xpe2 660, 3w/led max , 12 pieces /strip
channel 5: cree xpe2 730, 3w/led max, 12 pieces /strip
channel 6: uv uv uv

everything works with 2 driver, one meanwell 600h48a for the white and 200 watts meanwell for the colored led , everything controled by bluetooth mesh via illumi meshtek
each strip can go up to 120watt but i will push them at 50/60w maximum i dont need that much, and i wanna put the accent on efficiency + thermal control dissipation
gonna putt some 200mm noctua pc fan on each structure

- i also bought long time ago an apogee sq520 for light mesuring

- for the CO2, its ambiant, i live in a big tower in the city, i was shocked when i measured the co2 concentration in my flat..... even on the balcony its 800ppm co2
i think its from the general heater from the bulding + pollution....
but i think for plants its great no?


i checked on https://scynceled.com/technology/dli-calculator/ to see what 60 DLI represent, i was nicely suprise, i can go @500/600umol/m2 on veg and 1000umol/m2 , its gonna be the fire on the tent my friend

ps2: im so in love with the nichia 5K 97 CRI mixed with nichia 2K spectrum, its like the sun i let you picture of the spectrum as well
have a great day

I think you are good to go. Nichia is a rare name around here and the 757/optisolis are some amazing diodes. Tag me in your journal.

Cutter is great, I've been looking at the Cree Fidelity in 4000/2700m with 98cri running 2.5umols/j

So glad you have the SQ520 so you're able to measure the wider range.

 

[Grisbi]

I think you are good to go. Nichia is a rare name around here and the 757/optisolis are some amazing diodes. Tag me in your journal.

Cutter is great, I've been looking at the Cree Fidelity in 4000/2700m with 98cri running 2.5umols/j

So glad you have the SQ520 so you're able to measure the wider range.

thank you sir, i have those strip since 2 years , couldnt grow because of lake of space...i now move on bigger flat...gonna be amazing , light are perfect to me, have the mesurement stuff for light and water,
its gonna be my first grow ever sir.... after 5 years of research ( yes i know that seems crazy) , i decide to go with autoflow , i really wanted some very nice air circulation, still have to find a way to integrate my 8 x200mm noctua fan on the closet, but i have an carbonactiv silentbox1000m3 for exhaust ( i will push it at 50/60% ) organic with supersoil , i have to choose between Flo organic super soil with light mix OR Ecothrive Eco-Life Organic Potting Soil +light soil + actived charcoal, alfafa , kelp, Mycorrhize ( great white)... still have to decide
for the seeeds , its gonna be nightowl seed, brother in farm and mephisto... still have to decide witch strain.... im looking for fruuiityyyy terp

as you can see....im a liittle bit maniiiaaac...