Broilers are reared in various production systems. The three important aspects of light which play a pivotal role in determining the production performance of broilers are intensity, duration and colour. It has been noted that broilers grow better during constant photoperiod while darkness is important for the welfare of the birds. Further, Broilers under blue or green light become significantly heavier than those reared under red or white light. Thus, it is necessary that a particular lighting program considering production and welfare concerns may be standardized and followed for optimum production performance in broiler operation 

Keywords: Broilers; Photoperiod; Light Intensity; Scotophase.