Christian Opdal Eid Norwegian University of Science and Technology, Department of Electronics and Telecommunications, Hellerudveien, 22 B, 0672, Oslo, Norway christian@opdaleid.no International Journal of Fundamental Physical Sciences (IJFPS) 6 2 9-12 June, 2016 2231-8186 https://doi.org/10.14331/ijfps.2016.330096 The Hessdalen light phenomena, observed in Norway since 1981, lack a confirmed explanation despite decades of investigation. This paper proposes that superposition of cosmic radiation, influenced by local magnetic field distortions in Hessdalen Valley, is the root cause. The valley’s geology and conductive river may cause these cosmic EM waves or particles to collide and shift into the visible spectrum. The theory matches key observed properties such as location, randomness, color variability, spectral continuity, and motion patterns. The findings suggest further experiments to correlate cosmic radiation with local magnetic field fluctuations. Hessdalen Light, Superposition, Light Phenomena, Cosmic Radiation https://creativecommons.org/licenses/by/4.0/