Lighting from emissive materials is visible only in the Global Illumination AOV. For more information, please see here.
Matted objects do not work with the Diffuse Lighting AOV. Shadows that are normally visible in the Diffuse Lighting AOV will not be present for a matted object and you will need to color correct and multiply the background with the shadows/inverted shadows for the matted object.
How to use:
Add the Diffuse Lighting AOV to the primary AOV composite.