LED vs Greenhouse

[Smokey42o]

@Smokey42o

In order to cover a 4x4 space you need to be at 24" and their chart says 530 Umols?

@jdm61 Yes I may have believed the lower DLIs were good in the past but new information about light is always coming out. I now believe 42 is the target number on the low side. Remember my statement says "thrive" not just grow. Back in the burple days I grew with 20 or less DLI and my plants and harvest numbers looked like it also. Light science continues to evolve.

I am not sure you are reading the DLI map correctly? Growing outdoors in the PNW is a real crap-shoot after mid September for so many reasons but the lower DLI is part of that. There is about 5 months in Florida that are not ideal for thriving cannabis. That does not mean it won't grow.

the tent is 4x4 but the 4 plants will be in 1x1 center area, then 2x2 for most of their lives. once fullsize i lollipop them and use a mesh to fan em sideways and get a nice spacing to let let at all the nugs get equal light. i will look into a newer light and use the phlizon as my secondary. newer is ALWAYS better. right?

september in the PNW: what stops the growth is lack of sunlight once the september rains roll in. by the time the days hit 12/12 it's been dark for weeks. autos are very welcomed here with our long periods of sun (from may until august we won't see any measurable rain at all)

 

[Mañ'O'Green]

the tent is 4x4 but the 4 plants will be in 1x1 center area, then 2x2 for most of their lives. once fullsize i lollipop them and use a mesh to fan em sideways and get a nice spacing to let let at all the nugs get equal light. i will look into a newer light and use the phlizon as my secondary. newer is ALWAYS better. right?

september in the PNW: what stops the growth is lack of sunlight once the september rains roll in. by the time the days hit 12/12 it's been dark for weeks. autos are very welcomed here with our long periods of sun (from may until august we won't see any measurable rain at all)

Oh you of little faith, Your 4 plants will be jam packed in there by the time you reach harvest.

This is 6 plants in a 4x6 space.

May you need a shoehorn to get into your space

@draxcel It is not really possible to extract the information down to a smaller space because reflectivity will play a much bigger role. I would suggest that you download the Photone app on your phone and measure what you are getting at the canopy level.

 

[Smokey42o]

given identical environmental (temp, humidity, breeze, ph, grow medium, nutes program) do you think an auto flower would grow better on an increasing sunshine schedule from 11 to 16+ hours per day, vs 24or18-hour LED lights for their whole lifecycle

and no i can't put lights in the greenhouse for nighttime. people that drive by will think aliens have landed.

 

[Smokey42o]

i noticed that even when shaded by my roof, the plants follow the glare of the sun off the ocean just like sunflowers do

 

[draxcel]

Oh you of little faith, Your 4 plants will be jam packed in there by the time you reach harvest.

This is 6 plants in a 4x6 space.

View attachment 1423862
May you need a shoehorn to get into your space

@draxcel It is not really possible to extract the information down to a smaller space because reflectivity will play a much bigger role. I would suggest that you download the Photone app on your phone and measure what you are getting at the canopy level.

@Mañ'O'Green I measured with photone in the morning and It was 20is dli,later I put the light at about 30 cm from canopy and 60% dim,It shows 27 dli and 377 ppfd.I am running 20/4h
Should I Rise light or rise dimming?

 

[draxcel]

i noticed that even when shaded by my roof, the plants follow the glare of the sun off the ocean just like sunflowers do

I also apologize for showing in this thread and asking for light specs.A big thank you to @Smokey42o

 

[Smokey42o]

still not too late to start your own thread. jus sayin'

 

[jdm61]

@Smokey42o This is the information from Philzon I an using.

View attachment 1423836

In order to cover a 4x4 space you need to be at 24" and their chart says 530 Umols?

@jdm61 Yes I may have believed the lower DLIs were good in the past but new information about light is always coming out. I now believe 42 is the target number on the low side. Remember my statement says "thrive" not just grow. Back in the burple days I grew with 20 or less DLI and my plants and harvest numbers looked like it also. Light science continues to evolve.

I am not sure you are reading the DLI map correctly? Growing outdoors in the PNW is a real crap-shoot after mid September for so many reasons but the lower DLI is part of that. There is about 5 months in Florida that are not ideal for thriving cannabis. That does not mean it won't grow.

Those charts seem to indicate that the only place you could grow a long flowering sativa would be the desert of the southwest. Yet South Florida is closer to the equator than any other spot in the continental US.