Alright you get that damn shelf out and of course your going to want a light. I cant tell you how to hang it though because there are many different types of lights the best part is that whatever light you buy almost all lights that i know of have fixtures for them that are made to be hung or screwed into the ceiling. Whatever light you use you want to be able to ajust the light as the plant grows so get some ceiling hooks or somthing that will allow you to change the height of the light so buy a light and hang it above your plant and raise it as it grows but dont put the light to close or the heat might harm your plant. You should already know that though.