Mesh joins visible when Lighting is too intense?

Hi,

Can anyone tell me how to fix the lighting issues on the following image? The two blue arrows in the first image point to a distinct color change which appears when the intensity of the UnityEngine.light(s) reaches a threshold (either by adding more lights or turning up the intensity on the lights).

The wall game object is made up of four meshes. Each mesh has a UV map and a seamless repeating texture.

The lights are in 'Realtime' mode, range is set to 3 with intensity set to 1.

I get this effect on my walls I have a bright light close to where two meshes meet.

Please let me know if there is any other information that would be useful in solving this.




Showing wire frame:



Thanks,