I was going to say the same thing! It’s a simple energy balance: the human body uses about a 100 watts of energy by burning carbohydrates or fats.

Plants would have to fix 100 watts worth of carbohydrates to simply maintain balance. Only a few plants can achieve 5% efficiency, so minimum you’d need 2 kW of light being absorbed by your plants.

That’s a weed grow room, not an office!