Pixelated emissive lighting

[Pwnsaur]

I've been trying to render a couple wall sconces, but the lighting does not come out properly- it has patterns of dots along the edges, rather than a smooth gradient. Help would be appreciated.

Attached is the .bip file.


Update:

The second file has the material changed from emissive to an area light, but has weird pixelation along the edges...

[KeyShot]

For this scene it is better to use an area light diffuse rather than the emissive material. It will make the rendering much faster and with less noise.

[Pwnsaur]

Actually, I tried that in the second .bip file, and it leads to a significant amount of pixelation on the edges of the light..