Malliga, J.Moorthy, M.TANUVAS2020-02-272020-02-272007-02http://krishikosh.egranth.ac.in/handle/1/5810143738TNV_PF_Feb2007_28-31Light is an important aspect of an animals environment. Avian species as well as mammalian species respond to light energy in a variety of ways, including growth and reproductive performance. For chickens there are three major functions of light: 1. To facilitate sight, 2. To stimulate internal cycles due to day-length changes, and 3. To initiate hormone release.en-USVeterinary SciencePoultry ScienceArticle