guitar case grow

so my friend had this idea: growing in a guitar case. like a small version of sea of green, just for occaisional personal use. he put a piece of wood in the base of the neck of the case, so as to make a platform, and made sure it sealed the light when it was shut with weather stripping, and then used that for germination/seedlings, and then used the bottom for mature plants/flowering. he used one of those curly flourescent lights for the top, and a tube light for the bottom, and put the case in the corner of his closet [because he never uses it, he just carries his guitar] and it looks like it's working pretty well, except for ventilation.... but he's gonna get a little humidity thing that has the beads that absorb it and drop water into the container on the bottom... i dont know what they're called, or how else to describe them, but they work....

Even with the dehumidifier he is going to need at least a small computer fan venting. He is on the right track will humidity, but plants still need air exchange to grow well.

i'll tell him... this isnt for a massive grow though, its like his first one, and i've only tried growing once, and i got caught, so neither of us know much about it.....