Lightening range in UE4 ?

Hello guys, I’m working on a project with my friend.

We are working on a PAPER2D project and we have an issue for lightening sprites.
The sprite material is “TranslucentLitSpriteMaterial” and that’s work if we are in location close to “0,0,0” (screen bellow) It works !

BUT, if we are (I was at 2500,0,14800) there are no light effects and we don’t understand why and how we can change that (screen bellow), As you can see, there are not light effects, only the background.

So, it’s not a material problem (works on location 0,0,0)

If you have a solution about that, it would be cool to share this !

Thanks guys !