More lights = darker object? (see Pictures) So, I rendered a scene and I was very happy with the lighting, but I wanted more to the image, so I moved things around and added a background object. Now the lighting is totally messed up. No matter what I do the Logo Shape won't light up the same way. The face just won't light up. Here are some pictures:


And here is the most recent render: 

Here is the blender file: https://drive.google.com/file/d/1bLsiB4DCggrthn-skXoKDreGBCGBQ4a9/view?usp=sharing

It's missing some textures, but it should be the same otherwise.
The logo in the second image has some Subsurface shading.

I would suggest for the moment to go back to basics,

1: Clean up your logo shader so that it isn't using any subsurf.



2: Replace all your lights with a couple of area lamps.



result is :



Now you can go back and set up shaders and lights as required.