Thats funny, if u put it outside in a place that gets good sun it will do just fine. Its no need to worry about not a sufficient amount of light coming off of the sun. For christ's sakes its the SUN. Anyway you should top your plant so that it will stop growing right were u top it but the side colas could still grow taller but u can tie them down so in that case u can veg until the height that is desired.