Hi, we just put a heat lamp in our very drafty 4' x 8' chicken coop. We have 14 chickens that are 18 weeks old. The heat lamp that we put in has a 125 watt bulb, instead of the standard 250 watt. We do not have a timer on it or anything fancy. We are expecting a winter with below zero temps this year again, and since our coop is quite drafty and we are not really sure how to remedy that, we figured that a heat lamp might help our chickens to stay a little bit warmer and keep our water from freezing. The lamp is in and on, but what I am wondering is if the full time light will prevent them from laying? Should we put in a dimmer switch? Will a dimmer switch affect the heat output? My grandfather raised chickens before my time and my dad says that they need some dark to lay eggs; he also said that my grandpa would put a light on a timer and have it on from midnight to 2 a.m. and then again in the morning and that he got two eggs a day from each chicken. What do you think? It really is quite bright in the coop, is there a way to diffuse the light a bit? I'm just not sure what to do. I know that a lot of you will say that the chickens don't need the heat, but with cracks all around the entrances and windows, I just don't see how they won't be cold. Thanks.