I have two images. This is the render layer of the building and lighting. First, I will say that this lighting discrepancy occurs when rendering all layers as well. In order to simplify, I just rendered the building exterior.
1st image shows the correct exterior lighting with HDRI only, No point lights and mesh emitters.
2nd image shows rendering with same HDRI as first image and 1 point light at each patio roughly where red dot is shown. Power at 20 watts. On the inside I have mesh emitters for the chandeliers and eight point lights at the wall sconces set to a power of 40 watts each.
You can clearly see that when I render same scene, same render settings but adding the point, and mesh emitters the exterior light changes dramatically.
Can anyone explain why this is so?