I have heritage breeds where I expect egg production is tied to natural photoperiod. That means they are not supposed to lay until the end of this month to possibly into February if is really cold and dreary. I am also reliant upon the chickens seeing most predators that come into barn, especially Great-horned Owls, as the chickens will then produce alarm calls alerting dogs to problem. A 100-watt incandescent is too bright so I backed off to a 60-watt incandescent which is too bright for pens close to light source. Then a series of heat lamp bulbs were used, but they were old and do not hold up well during winter when turned off and on a lot. I just replaced the 60-watt incandescent with a supposedly similar output LED bulb. Light seems even brighter than the 100-watt. There is something about the spectrum as well that may be perking the birds up; possibly too blue. Is there such a thing as a red LED bulb that can be used?
