Area lights acting strange - look like point sources

Hi, I noticed the area lights in my scene suddenly stopped working.

I was testing them out and thought they stopped rendering however when I zoom out I can see something which looks like a point light source.

The walls and lights are marked as Static. The render mode is important, Intensity and bounce are both set to 1, and Halo is checked.

I've tried various different combinations of settings but it just doesn't work. It's as if the range and size are different.

Has anyone come across this before? I prefab'd this yellow light object and dragged it into a different scene and it works perfectly.

Is there anything within this scene that could cause this?

Update - Render is fixed. The Material of the walls was metallic so nothing was showing? However. I'm still having this point light problem. In game it is seen as a light box when moving far away from the source. similar to the picture on the right. It's like a filter over the camera. Only visible >5m away