How much light is too much in frowering?

RobertM46

Member
How much light is too much in frowering?

Is that different between photo's and auto's?

I have read that anything over about 10,00 PPFD is asking for problems, is that the same for auto's?

Anyone?
 

firsttime69

Well-Known Member
Im hoping you meant 1,000, i wouldnt say 1,000 is too high but anything after 1000 you should be supplementing Co2. Weed can be pushed to 2000 and still show good results.
 

Nutty sKunK

Well-Known Member
DLI is more important than light intensity.

Since autos typically get 50-100% more light than a photoperiod. Fading fan leaves/too much light becomes easily done
 

Delps8

Well-Known Member
A PPFD of 1,000µmols is on the high end for cannabis - the light saturation point for cannabis is 800-1000µmols. I've run my autos at 850-900 (Gorilla Glue) and 850± for my current Strawberry Pie auto grow.

My data represent the average PPFD for the samples that have the highest sets of readings. I discard the low values that crop up on the edge of the tent because my concern is to ensure that the parts of the plant that are getting the most light are in the 900µmol range.

Per the DLI comment - absolutely correct. You can pick your photoperiod for autos and I run 20/4 so my DLI is generally in the high 50's with some spots in the mid-60's. Cannabis loves light.

"Fading fan leaves/too much light becomes easily done" - "easy" - not grow light installed itself and turned itself on. There's so much information and help available that if a grower repeatedly inflicts damage on his plants, that's a learning problem not a lighting problem.
 
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