Negative light neon effect - Lighting and Rendering - Blender Artists Community

Hi there! I’m new here so be gentle or I’ll tell my mom. Last day I was playing around, trying to save time by setting a spot light to negative intead of making all my scene with panels. It came out like that neon thing: I kinda’ liked the shot but I where not able to render the scene with the neon effect. Same for the viewport render. It looks like my laptop ain’t suited for the software. Anybody have ideas to reproduce the thing with nodes ? My first attempt gave me amateur result like

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