Depending on how much light gets inside the coop, you may want to put a light on a timer inside to ensure sufficient photoperiod for egg production. They need around 13 hours. Perhaps you have researched egg production, but here are some tips: http://freerangereggs.blogspot.com/2009/03/why-hens-stop-laying.html
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender