Hi, I am trying to incubate 12 eggs in a small home-make incubator. I built the incuabator from a styrofoam cooler, 40W bulb, thermostat , and an old computer fan. A few days ago candling looked good. We are now on day 18, and everything was fine when we left for church at 9:00. When I got home at 11:20, the light fixture had fallen out of the styrofoam cooler and was sitting on the counter. The temperature inside the incubator was 74 degrees, end the eggs felt cool to the touch. I quickly put the fixture back in place, held for now with duct tape while I figure out what to do. Do you think there is a chance for the chicks to survive? It's now 11:45, and the incubtor is back up to 92 degrees. How long can the eggs survive a drop in temperature?