With winter comes reduced daylight hours and often a reduction in egg production. My four gals went from one egg a day on average down to one egg between the four of them as soon as it started turning dark at 4:30. While I love the hens, I also love the eggs they produce so I decided to take action. We installed a lightbulb the coop. IT WORKED! We are back up to three or four eggs a day and I get a total kick out of going out in the evening to see the coop all lit up.