Need help, Using homemade pc growbox, simple questions

Hello. I made a home made pc grow box, it has 2 fans and it can fit 2 decent sized plants. I have this light reflecting stuff around the walls of the grow box. I just planted 2 seeds in 2 different pots, im using 1 100w light bulb that heats very nicely, i was using 2 but it was to hot. What i am wondering is how long do i have to wait to harvest the plants, and how much weed can i get off 1 plant?

5 months. 1 pound.

Too many variables bro.

yea your set up is cool bro shit put up some pics

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theres no way hes gettin 1 pound if hes flowering in that

im guesing 3/4th an ounce if you are lucky.