Dr. Darrell Karcher at Purdue University has completed a preliminary investigation of the visual perception of hens in aviaries funded by the USPOULTRY Foundation.  It was determined that brown and white- feathered strains perceive objects differently based on the density of receptor cells in the retina.  Perception decreased with age, irrespective of strain.  The research team is developing models to determine how lighting systems impact visual perception by hens of their environment.  The ultimate objective is to design systems compatible with aviary modules that will reduce feet pecking, damage to the sternum and to optimize production.

The industry needs guidance regarding light intensity and duration over the producing day, both in modules and in the house, optimal location of aisle and module lighting and the spectrum to which flocks are exposed. In the interim manufacturers of lighting installations need to upgrade technology and quality control to eliminate “flicker” and prolong the life and color output of LED bulbs.