Well , we have close to 100 head in our flock . About 35 are really not old enough to start laying just yet . BUT the others are close to 9 months old and was only picking 3 - 5 eggs a day . When the weather started gettign cold , DH installed lights inside both our coops and BINGO ..... We have started picking 18 eggs to 2 dozen a day . Lights come on around 5:ish PM and off around 8:00 AM ... they still roosting and sleeping as usual , so I think they had their inner clocks backwards .... Looks like their DOWN TIME was during the summer months , but now we have jumped started the production . LOOK OUT FOR THE SPRING , they will all be laying by then .