Ok, got it figured out. I was holding the light behind the egg thinking I could see directly thru it. Instead, I held the light in front again the shell and at an angle. Worked find. 5 eggs are left. 3 of them look as if there is nothing but air inside. No dark spots, just illuminated. The other 2 showed the air bubble but no movement. It also appeared on those two that the area opposite the air bubble was ever so slightly jiggly, like there was liquid inside. Think the eggs are still viable? She originally had 16 eggs and I remember when she tried sitting on them, her body did not cover them entirely. Could it be these are just duds?