I think light is the first manifestation of the absolute, meaning it is outside of time and space, which are secondary things anyway. Consciousness is primacy, everything is consciousness and consciousness is everything. What are your thoughts? The fact that you can measure light does not mean it exists, as it only is measured in the man made mathematical concepts to allow it to work with theory. Einstein can even tell you light does not exist on this plane. A phenomena... something absolute, matter is not absolute and matter is though, conscious, but non existent in the sense that its not just the only thing that is there.