Since I have your attention I'll ask another question. How much lighting is needed in a shed this size to encourage laying and what kind of bulb is needed?
Any bulb will work, tho older fluorescent tubes have a flicker rate that is to be avoided with chickens.
I've used both incandescent 40W and 60W and CFL(60w 'replacement') and both seem to work fine, I kinda like the CFL as it gains full brightness a bit slowly rather than instantly.
It needs to be bright enough 'to read a newspaper on the roost' as one member here puts it.
Should shine a pretty good light on the roost, floor, feeder and waterer, so they can see to move around and eat and drink. Some folks just use christmas lights.
Depending on how big coop is and how many birds, you may need multiple fixtures or higher wattage bulb(s).
My Notes on winter lighting:
Sometimes first year layers will lay all winter without supplemental lighting, sometimes they won't.
Older layers need 14-16 hours of light to lay regularly thru winter. Last winter I used a 40 watt incandescent light(this year I am using a CFL) that comes on early in the morning to provide 14-15 hours of light and they go to roost with the natural sundown. Last year I started the lighting increase a bit late(mid October), the light should be increased slowly, and the pullets didn't start laying until late December. Here's a
pretty good article on supplemental lighting. Some folks think that using lighting shortens the years a hen will lay, I don't agree with that theory but I also plan to cull my older hens for soup at about 3 years old.
