Dark Light and Dark Radiation are not widely recognized or established concepts in modern physics. there is no scientific consensus or widely accepted evidence for the existence of these phenomena.
However, I can provide some information on related concepts that may be of interest:
Dark Matter: Dark matter is a hypothetical form of matter that does not interact with light or other electromagnetic radiation. It is inferred to exist from its gravitational effects on visible matter and the structure of the universe. While dark matter is still not directly detected, its existence is supported by various astrophysical and cosmological observations.
Dark Energy: Dark energy is another hypothetical concept in modern physics. It is believed to be a form of energy that permeates space and is driving the accelerated expansion of the universe. Like dark matter, dark energy is not directly detected but is inferred from observational data, such as the measurements of the cosmic microwave background radiation and the large-scale distribution of galaxies.
It's important to note that the terms "dark light" and "dark radiation" may be used in different contexts or by different authors in non-standard ways. If there are specific scientific papers or theories that use these terms, they may refer to more specialized concepts not covered by my training data. However they are not widely recognized concepts in mainstream physics.