How do you plan to ventilate and cool this tiny space? That will help determine your bulb.
Thanks for all the responses guys! There is actually two small compartments in which i am going to be growing. However the ceiling of these compartments are slanted. so, at its highest point, it is about 4 feet, and at its lowest, it is 1 1/2 feet. And i believe it is about 1 1/2 feet wide. Hopefully i can get some pictures sent to me in the next few hours so i can actually show you guys the space.
Btw, thank you for that link, it was pretty helpful!