Recent scientific observations utilizing the Hubble Space Telescope and the James Webb Space Telescope have provided new insights into the origins of light in the early Universe. According to the collected data, small dwarf galaxies played a significant role as sources of photons during the Universe's formative stages. These photons contributed to the process known as cosmic reionization, which transformed the Universe from a dark, opaque state into one that was transparent and filled with light. The findings help clarify a longstanding question in cosmology regarding what objects were responsible for emitting the first light after the Big Bang. The results indicate that, rather than larger galaxies or other cosmic phenomena, it was primarily the smaller, less massive dwarf galaxies that produced enough energetic photons to 'switch on' the lights in the early cosmos. This research enhances our understanding of cosmic evolution and the development of the first structures in the Universe.