Shading or lighting looks off on my teapot.

OpenGL OpenGL: Basic Coding
1

I’m working on a project which involves loading a teapot from an OBJ file. I’ve successfully parsed the vertices and the faces and computed vertex normals to smooth out the pot, but my lighting looks off.

Here’s mine:

[ATTACH=CONFIG]1012[/ATTACH]

It should look something more like this:

[ATTACH=CONFIG]1011[/ATTACH]

Any idea where I’m going wrong?