Marijuana window box

I have a window box that would fit perfectly in my closet . . . would it be bad to grow 5 plants in one container as opposed to 5 separate containers?

theres some problems with that, they will fight for space and the stronger plants will overtake the weaker ones

when you find males that will be a problem

and finally it will be hard to put a light on them and turn them compared to normal pots

Do you mean like one container full of medium to grow 5 plants? Wouldnt be a good idea, roots get tangled, if something goes wrong, you risk losing more plants etc. If one suddenly has a problem, you cant set it aside and give it special attention to help it recover.