Okay so I have about 15 hens of various ages about 1/2 are of laying age.2 were laying until a few weeks ago then quit. I now think I quit getting eggs from them and no eggs from my youger ladies because we are only getting about 10 hours of light. From what I read I will have to get a light in the coo to get eggs again. My daughter NEEDS these ladies to start laying again as she wants to do a science fair project on the effect peanuts have on egg laying/size frequency etc. SO if I add the light today how long will it take for at least my older 2 hens to start laying again? They stopped laying about a month ago except for the rare single egg from my red sex link aka oldest and workhorse of a chicken.