I tried candling the jumbo cortunix eggs I have in the 'bator right now. This is my first time hatching, and I built the 'bator and the candler (box with aluminum foil on the inside over a halogen lamp). So this is all very new to me! I candled four of them tonight - the lighter ones with the least brown blotches. I'm on day 13. Of the 4, 3 I could make out an air cell very clearly, and the rest of the egg was dark. One of them lit up easily, and had a small, irregular-shaped dark spot that moved around when I tilted the egg. I'm guessing it was a partially developed embryo? So am I doing this right? Does this mean that the 3 that were dark are alive? I had a couple temp fluctuations in the beginning, so I'm really hoping they hatch!