Kharas, its a good thing to shade but remmember from where you shade, this image is a very good example of what i am trying to say!
What we see in our little pumpkin image in a very dark night, the only light source is the stars in the heaven, i don't know maybe you have some kind of spot light that ain't shown in the image but ells way the light source should be the stars.
Regards,
Norlem
Edit: also not to blame your or anything but is that shade edit, is it pixel by pixel cos it looks like some auto tool in photoshop. Not saying that you have done so seeing as i don't know.