I had a dz black sex links last winter and I used to leave a light on all night for heat and egg laying they all passed due to a mink or weasel. But now I just got 2 weeks ago 13 barred rocks. My question is should I put light on them in the winter months to get more eggs or will this " burn them out" sooner ? Or is the light method a myth? Since this last batch I have fixed where the killer got in so I am hoping for better results. Thanks