The complete tutorial on how to render lighting using OpenGL can be found here:
http://www.haroldserrano.com/blog/anatomy-of-light-in-computer-graphics
Applying light to a character using OpenGL ES 2.0 in iOS devices
Objective-C++MIT
The complete tutorial on how to render lighting using OpenGL can be found here:
http://www.haroldserrano.com/blog/anatomy-of-light-in-computer-graphics