I live in the PNW, and I'm wondering if windows are necessary for my coop? It will house 6-8 hens, maybe a roo, and they will have a run of their own, perhaps partly covered from the elements. So, how much light is needed? These are our first chickens, and we're not sure if leaving the windows off is a bad idea? It would save a bit on the budget, however it seems to me, that even in the early am before I open their door to the run, and if they choose to go in to lay, light would be beneficial...We aren't planning any electrical at this time either... So, can you all in the know, please enlighten me about light?