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The ability to do work is defined as Energy. It is categorized into different types. Light energy is considered as one of the most important forms of energy. As a matter of fact, life on earth evolved because of Sunlight (The light radiations reaching the surface of the earth are adequate to sustain life; which makes other planets devoid of life). Without sunlight, we cannot perform our routine activities. The use of light in the field of Dermatology has been an old concept, but earlier it was being used in limited indications. After a thorough research, it has been highlighted that Light energy if used adequately can give unmatchable results in the field of Dermatology.