This paper discusses the religious phenomenon and Buddhist interpretation of the "light phase", and then focuses on the "ālokasaṃjnā" (perception of light) in the follow-up homework of "sense restraint" and the "ālokakṛtsna" (kasiṇa meditation) in the "ten spheres of totality", offering a comparative study of their different connotations. From the perspective of phenomenology of religion, all religions attach great importance to light and give light to the meaning of hope, joy, wisdom, liberation or salvation. In the Buddhist scriptures, "light" is often used to describe the various supernatural realms of the Buddha, Dharma, Samadhi, and Enlightenment, as well as the bright aspect presented by the achievement of meditation. This is the effect of practice achievement. In the Buddhist scriptures, there are some practices that use the "light" itself as the state of the object. The most representative ones are the "perception of light" in the "sense restraint" (indriya-saṃvara) and the "bright light meditation" (āloka kasiṇa) in "ten spheres of totality" (dasa kasiṇāyatanāni). This paper proposes the following two observations and analyses in the narrative context of Theravāda Buddhism and Northern Buddhism: 1. What kind of person, at what time or in what state, will have the effect of "light phase"? 2. The classical basis, content and methods of the practice of "practice of staying awake" and "bright light meditation", the similarities and differences between this two. This leads to the following conclusion: The objects of "perception of light" and "bright light meditation" are both "light phase." The difference is that the light source of "perception of light" comes from the remaining power of the tranquil light and the wisdom light of meditation, but the light source of "bright light meditation" is the carefully designed natural light or lamp light. "Perception of light" and "bright light meditation" have similarities and differences in their learning goals and effects. The similarity is that both can stay away from the hindrances of sloth and torpor (thīna-middha), and the difference is that the practice of "brightlight meditation" can trigger magical powers from meditation, that is, you can achieve the supernatural powers of clairvoyance, but this is not the learning goal and effect of "perception of light".
