What's the different of light intensity in different plants stage?

ViparSpectra

ViparSpectra

Well-Known Member
As we all known, light is very important factor for the plants'photosynthesis.The plants may need different light intensity in different plant stage.

Here are some recommened PPFD data:
Plants stage PPFD
Seeding 200-400
Vegetative 400-600
Flowering 600-1000

Do you agree the above? Or you have different standard?
 
HippieFarmer420

HippieFarmer420

Well-Known Member
I got all my sections set at 230 ppfd, I started off at 150 and then when they opened up I turned up the ppfd to 230, Ill hold this number until I see true leaves and then Ill start to dial up the ppfd based on the proposed charts :)

I love this par meter, I use it a lot more then I thought I would.
 
HippieFarmer420

HippieFarmer420

Well-Known Member
I was bored so I went ahead and adjusted all the lights again..

I figured I'd up the ppfd a bit more, was able to do it by adjusting hanging heights.

Got to love this par meter.

SF4000
Screenshot_20221103-002445_Tuya Smart.jpg

VS4300
Screenshot_20221103-002642_Tuya Smart.jpg
PL4500
Screenshot_20221103-002727_Tuya Smart.jpg

600w HPS
Screenshot_20221103-002953_Tuya Smart.jpg
 
ViparSpectra

ViparSpectra

Well-Known Member
HippieFarmer420 said:
I got all my sections set at 230 ppfd, I started off at 150 and then when they opened up I turned up the ppfd to 230, Ill hold this number until I see true leaves and then Ill start to dial up the ppfd based on the proposed charts :)

I love this par meter, I use it a lot more then I thought I would.
Click to expand...
@HippieFarmer420 Glad this could help! Looking forward to more shares! Thanks! :)
 
N

NoHorseBlankets

Member
I'm curious what some of your thoughts are regarding reducing DLI mid-late flower. Do y'all keep it cranked till the end or start reducing it at some point?
 
xox

xox

Well-Known Member
i think theoretically those numbers can be alot higher if the rooms co2 concentration is hovering between 1400 and 1500 ppm
 
Nizza

Nizza

Well-Known Member
ViparSpectra said:
As we all known, light is very important factor for the plants'photosynthesis.The plants may need different light intensity in different plant stage.

Here are some recommened PPFD data:
Plants stage PPFD
Seeding 200-400
Vegetative 400-600
Flowering 600-1000

Do you agree the above? Or you have different standard?
Click to expand...
If you are growing an autoflower plant under 24/h light and flowering do you still recommend 600-1000 ppfd? Or is this where DLI comes into play? My understanding is DLI is a better way to judge how much PPFD at what stage
 
B

bubba73

Well-Known Member
Nizza said:
If you are growing an autoflower plant under 24/h light and flowering do you still recommend 600-1000 ppfd? Or is this where DLI comes into play? My understanding is DLI is a better way to judge how much PPFD at what stage
Click to expand...
reason why you use less in veg then flower is the hours … 18/6 use less PPFD CAUSE OF LONGER HOURS OF LIGHT .. 12/12 hrs of light use more PPFD cause of less hours … but again need more light cause of it fruiting too…if that makes sense ..with an auto flower I would use 400-600 PPFD in veg and when you see it start to flower then start to dial it up till you see the max ( watch how the plant reacts ) ..
 
ViparSpectra

ViparSpectra

Well-Known Member
NoHorseBlankets said:
I'm curious what some of your thoughts are regarding reducing DLI mid-late flower. Do y'all keep it cranked till the end or start reducing it at some point?
Click to expand...
@NoHorseBlankets Well, it really depends on the plant's needs. Some plants need more light and some growers found cannabis plants respond better when cycling the intensity from low to high and back to low during the flowering period.
 
Nizza

Nizza

Well-Known Member
bubba73 said:
reason why you use less in veg then flower is the hours … 18/6 use less PPFD CAUSE OF LONGER HOURS OF LIGHT .. 12/12 hrs of light use more PPFD cause of less hours … but again need more light cause of it fruiting too…if that makes sense ..with an auto flower I would use 400-600 PPFD in veg and when you see it start to flower then start to dial it up till you see the max ( watch how the plant reacts ) ..
Click to expand...
for simplicity, I use DLI; that is my point
Daily Light Integral takes into account the hours in a day
 
hotrodharley

hotrodharley

Well-Known Member
HippieFarmer420 said:
I got all my sections set at 230 ppfd, I started off at 150 and then when they opened up I turned up the ppfd to 230, Ill hold this number until I see true leaves and then Ill start to dial up the ppfd based on the proposed charts :)

I love this par meter, I use it a lot more then I thought I would.
Click to expand...
It’s my most used grow tool. Far more than my EC meter. If you run LED I highly recommend one. Mine was less than $200.
 
HippieFarmer420

HippieFarmer420

Well-Known Member
I was starting to feel left out with everyone and their grow tents, so I went and got a 5ft x 10ft grow tent that I will use as one of my vegging areas, now I need to get some lights to fill it up lol..

I dont seem to do anything on smaller scales for some reason.
 
Nizza

Nizza

Well-Known Member
HippieFarmer420 said:
I was starting to feel left out with everyone and their grow tents, so I went and got a 5ft x 10ft grow tent that I will use as one of my vegging areas, now I need to get some lights to fill it up lol..

I dont seem to do anything on smaller scales for some reason.
Click to expand...
be careful going on a big scale with a single light, you might want to consider multiple fixtures for multiple stages of growth/ different dimming to save $$$!

that's my dream tent!!
 
HippieFarmer420

HippieFarmer420

Well-Known Member
Nizza said:
be careful going on a big scale with a single light, you might want to consider multiple fixtures for multiple stages of growth/ different dimming to save $$$!

that's my dream tent!!
Click to expand...
I've got over 10 different lights between leds and hids, I'm sure I will get some light in there :)
 
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