50w LED vs 1 plant

se vuoi sapere se la pianta arriverebbe alla fine la risposta è si' se vuoi sapere se ti fara' un buon raccolto è no in piu comlicheresti il tutto con un vaso cosi grosso con un 50W ti bastano 6/7 litri anche perche le radici non avrebbero abbastanza forza per coprire tutti quei litri di terra

I've seen a weed plant grown inside a PC case using a T5 light with surprising success, so yes, anything is technically possible with the right time and know-how. But you're certainly not describing an ideal growing setup, so I'm not sure whether it would be worth the amount effort for the returns you'd get. What are the dimensions of this container? What would you do for air flow inside? 50W is not a lot of light, even for one plant, but the COB can't be right on top of the canopy either as you'll get light burn, so you'll need a gap between the light and the plant. You'd need the right genetics so the plant stays small and doesn't stretch. A pump feeding air to the nutrient solution. Air extraction to control humidity. There's a lot to do to get a decent yield in a space so small.

No, 50w is barely enough to sustain life in general, let alone grow decent plant/buds.

1g/watt with cob.. bit higher with a high end one like a cree .. i forget the model numbers now. 1 plant prolly do okay as ong as you don't grow it too large.