What causes this weird light flicker in editor and while playing?

Development Rendering
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1

I am having issues with light flicker as of late, I don’t know what causes it and I would like to solve it, this is how it looks:

2

Here is another example:

https://drive.google.com/file/d/0B2UlKqRHB4gHelh5NVFpSU5WSWs/view?usp=sharing

3

Here are the settings for one of these lights:

It doesn’t matter if they are movable, stationary or static.

4

Is this happening in just this one project?

5

No, if I export all the meshes I need to a new project it also happens, a friend of mine is also reporting it on his project.