Resolved Light data

The code takes into account only one additional light source. I need the code to take into account several sources of extra light. What's wrong here?

Code (CSharp):

1. void AdditionalLights_half(
2. half3 WorldPos,
3. out half3 Color,
4. out half3 Direction,
5. out half DistanceAtten,
6. out half ShadowAtten)
7. {
8.    Direction = 0;
9.    Color = 0;
10.    ShadowAtten = 0;
11.    DistanceAtten = 0;
12.    
13.    #ifndef SHADERGRAPH_PREVIEW
14.       int pixelLightCount = GetAdditionalLightsCount();
15.       for (int i = 0; i < pixelLightCount; ++i)
16.       {
17.          Light light = GetAdditionalLight(i, WorldPos);
18.          Color = light.color;
19.          Direction = light.direction;
20.          ShadowAtten = light.shadowAttenuation;
21.          DistanceAtten = light.distanceAttenuation;
22.       }
23.    #endif
24. }