The hypothesis of tired light can be cast in terms of an elementary quantum of energy lost from a photon during each cycle. The uncertainty in time associated with the quantum of energy is the Hubble time. Given uncertainty at this cosmological scale, it is argued that complementarity between received photon energy and observed distant time dilation at the source overcomes the primary objection to tired light. Tired light would correspond to a flat pure dark energy model in the big bang. Measured supernova redshift and time dilation support this quantum interpretation of the redshift.
Colin Walker