I am picking up my first chickens on the weekend. now i am trying to decide if i want to supliment light. The chickens i am getting are 7 mths old (barred Rock) and laying well. At first i was going to let nature take its course and not add light. But not sure now. If i do decide to add light will any type of bulb work to keep them laying well or does it need to be a uv light?? If i dont add light will they just slow down egg production or will they stop all together.