Shader Affected by unity lights?

PHP:

Shader "Custom/Hatching" {
    Properties {
        _Hatch0 ("Hatch 0", 2D) = "white" {}
        _Hatch1 ("Hatch 1", 2D) = "white" {}        
        _Hatch2 ("Hatch 2", 2D) = "white" {}
        _Hatch3 ("Hatch 3", 2D) = "white" {}        
        _Hatch4 ("Hatch 4", 2D) = "white" {}        
        _Hatch5 ("Hatch 5", 2D) = "white" {}                    
    }
    SubShader {
        Tags { "RenderType" = "Opaque" }
        CGPROGRAM
        #pragma target 3.0
        #pragma surface surf SimpleLambert

        sampler2D _Hatch0;
        sampler2D _Hatch1;
        sampler2D _Hatch2;
        sampler2D _Hatch3;
        sampler2D _Hatch4;
        sampler2D _Hatch5;

        half4 LightingSimpleLambert (inout SurfaceOutput s, half3 lightDir, half atten)
        {
            float2 uv = s.Albedo.xy;        
            s.Albedo = 0.0;            
        
            half NdotL = dot (s.Normal, lightDir);
            half diff = NdotL;// * 0.75 + 0.25;
            half4 c;
            
            half lightColor = _LightColor0.r * 0.3 + _LightColor0.g * 0.59 + _LightColor0.b * 0.11;
            half intensity = lightColor * (diff * atten * 2);
            intensity = saturate(intensity);
            
            float part = 1 / 6.0;
            // KLUDGE: with "if" instead of "else if" lines between regions are invisible        
            if (intensity <= part)
            {    
                float temp = intensity;
                temp *= 6;
                c.rgb = lerp(tex2D(_Hatch0, uv), tex2D(_Hatch1, uv), temp);            
            }
            if (intensity > part  intensity <= part * 2)
            {
                float temp = intensity - part;
                temp *= 6;                
                c.rgb = lerp(tex2D(_Hatch1, uv), tex2D(_Hatch2, uv), temp);            
            }
            if (intensity > part * 2  intensity <= part * 3)
            {
                float temp = intensity - part * 2;
                temp *= 6;                
                c.rgb = lerp(tex2D(_Hatch2, uv), tex2D(_Hatch3, uv), temp);            
            }
            if (intensity > part * 3  intensity <= part * 4)
            {
                float temp = intensity - part * 3;
                temp *= 6;                
                c.rgb = lerp(tex2D(_Hatch3, uv), tex2D(_Hatch4, uv), temp);            
            }
            if (intensity > part * 4  intensity <= part * 5)
            {
                float temp = intensity - part * 4;
                temp *= 6;                
                c.rgb = lerp(tex2D(_Hatch4, uv), tex2D(_Hatch5, uv), temp);            
            }
            if (intensity > part * 5)
            {
                float temp = intensity - part * 5;
                temp *= 6;                
                c.rgb = lerp(tex2D(_Hatch5, uv), 1, temp);            
            }    

            return c;
        }

        struct Input 
        {
            float2 uv_Hatch0;
        };

        void surf (Input IN, inout SurfaceOutput o) 
        {
            o.Albedo.xy = IN.uv_Hatch0;
        }
        ENDCG
    }
    Fallback "Diffuse"
}

Hi Guys, can anyone tell me, how i can modify the shader (thanks ufo_driver for the modifications) so that is affected by unity lights?

thanks!