I use an autopot with two 8.5 liters (2.2 gal) pots. I can reach about 10cm (3") with the 120w LED and the reading is 1100, 1200 and 1300 PPFD. Below, I use 40w from an under canopy. The grow is small 82cm (32.2") height, 60cm(23.6")x50cm(19.7"). I am feeding with the recommended Remo nutrients and it is working… Is it correct to estimate that I can harvest at least 0.6g/w = (120w+40w)x0,6=96g? The strains are two zkittlez auto from Fastbuds.
Does anyone have a good estimate? I’ll post the harvest results here!!
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If considering things are all but perfect. his is my GUESS.
Make sure you dial in the most fresh air exchange possible. This, and light will be the main limiting factors.
Realistic Yield Range:
| Yield Level | Grams per Watt | Total Yield (160W) |
|---|---|---|
| Conservative | 0.4g/W | ~64g |
| Reasonable Goal | 0.6g/W | ~96g |
| High-End | 1.0g/W | ~160g |
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Don’t get ‘hung up’ on the yield numbers, just focus on the day to day process for the time being.
Yield will come later. 
Cheers
G
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I need to estimate since If the yield does not fulfill me I will increase the lights!!
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There are way too many variables. Genetics is the biggest one followed by light and environment.
There are some strains that can produce well over 750g/m2 and there are some that can hardly break 300g/m2
Going by the lights power is a silly way to quantity yield imo anyway. It doesn’t factor in how long the plants were in veg, and flower, or how long the photoperiod is in veg/flower, and the size of the space.
A well lit 2×4 with 250w will probably perform better than a 4×8 with 250w for example, as the light intensity will be much higher in the 2×4.
I think the advice to not worry about yield was sage wisdom. Yield comes with time, I think focusing on growing quality weed and finding strains that you enjoy is more important than how much you will get.
There’s so many growing methods and techniques, and they each have their own benefits and drawbacks, so it’s good to find ways that make sense to you and your situation and all that imo.
Also having more light will only increase your yield if you can also match the other growing parameters to compensate for the higher light. If the plants are unable to take up sufficient nutrition or CO2 they will perform worse under higher light intensity, it’s a double edged sword
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