This picture self-explains.
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And then at other angles the brightness drops off a cliff. 
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Pretty sure it’s been reported before. The actual light it gives off is too low and the effect (I think it’s bloom) is too strong.
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Agreed, way too much bloom.
I use this bug on my living room 
Welcome to a weird rendering bug that has to do with the light interpenetrating with the model.
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@macdguy Ready for UE4 4.12?
Rendering Updates:
High Quality Reflections
High Precision Static Mesh Vertex Normal/Tangent Encoding
Custom Resolutions for Sky Cubemaps and Reflection Probes
Custom Cubemaps for Reflection Probes
High Precision GBuffer Normal Encoding
None of those are related to the neon bars?
yeah but these features are neat and they might fix that in the future. bug fixes are usually not part of the preview. the list of changes is very small compared to full release at the moment.
If you can’t fix it, is there a way you could let us turn of bloom?
and the Pixel Inspector tool which lets you click on a pixel in the scene and visualize the material and rendering state that contributed to its colour.
Source: 4.12 Preview 5 Released For Early Adopters - Unreal Engine
Looks like 4.12 should be useful for solving this then. The Pixel Inspector is on the way. 
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