How to change brightness of a PBR material

Is there a way that I can vary the brightness of a mesh with a PBR material that doesn’t necessarily have an emissive color set?

First, you can push the level of the environment on this material. You can also make use of directIntensity (direct light intensity) assuming of course your material is also lit. Finally you can use post fx such as camera exposure. And you can also push your albedoTexture.level above 1.