The BRDFLight material is a special material provided with the V-Ray renderer. This material is generally used for producing self-illuminated surfaces. This material's light emission can be used as indirect as well as direct illumination in the scene.
This allows for light sources of any shape, and may even be assigned at the object level and at the face level for self-illuminating only portions of a mesh.
UI Path:||mat Network|| > V-Ray > Material > V-Ray Light
