I have looked through several pages in this forum now but have yet to find the definitive heat source thread, so hopefully some of you experienced brooders will voice your opinion. I will be brooding chicks this spring and wanted to know, real world, if some of these heat sources are better than another. I would feel confident in saying that a 100w white light bulb is out. What about the red heat lamp bulb? Could it mess up sleep cycle fort he little gals? Then I thought about ceramic heat emitting bulbs normally used for reptiles. No light at all, but that would mean that supplemental light would have to be added during the day if being brooded in the basement or garage, right? So then I move onto a heating pad under the bedding or brooder. Any thoughts on that? And finally there is the ecoglow. A little cost prohibitive since I don't plan on brooding more than once every 2-3 years. Is it worth the money for an ecoglow long term? Are there any heat sources that I may have missed?