I have two clients who have made the change to LED bulbs in their chicken houses.  They both are very happy with the bulbs.  One poultry farmer I know has 12 broiler houses, and he has made the change in all twelve houses.  He told me recently that the change has cut his electric bill by more than 50% !  Another farmer who has four chicken houses tells me that he has seen dramatic savings as well.  

Some power companies are cooperating with the Tennessee Valley Authority to incentivize customers to change to LED's.  For more information and to start the process go to http://www.energyright.com/business/how_to.html.  You can also contact your local power company to inquire about the program.