The 'holy grail' is a gram per watt, so if everything were to go perfectly, you'd get 400 grams (whether it's off one mongo plant or three medium ones or ten little ones, whatever). Realistically, hope for half of that, and be happy if you get that much, and if you get more, consider it a blessing and a bonus.
jamstigator Reviewed by jamstigator on . How many plants can I fit with 1x400watt Metal Halide light? The space is 3ft x 2ft.. How many plants can I fit in this space if under one 400Watt MH light? I'm planting for yield and not really care about quality. Oh another question.. How much can I yield under this light? Thanks in advance. Rating: 5