Cocos2d sample Blur and Lighting Shader
Please see the following write-ups which future explain the Blur and Lighting Shader code for cocos2d v2.x.
http://smashriot.com/dynamic-lighting-shader-with-cocos2d-v2-0/
http://smashriot.com/cocos2d-v2-0-and-shaders/
Jesse from SmashRiot
@SmashRiot