If you've ever noticed the different grades on egg carton labels when shopping for groceries and wondered about their meaning, here's what to know.

What’s more, blood spots in brown eggs are harder to detect using the candling process, as the shell is a darker color. As a result, brown eggs with blood spots are more likely to pass through ...

Candling eggs at home can help determine how fresh an egg is, as well as whether certain imperfections such as cracks, contamination, blood spots or meat spots exist within an egg.

There are also reports of punctured eardrums after the candling process. The FDA hasn’t approved ear candles for any medical use.

Illumination on shell surface exceeds 200000 Lux. This procedure allows to exclude sub-quality eggs on laying stage, and to reveal unfertilized eggs in incubation process. In the photo you can see ...

Some also go through a process called ‘candling’ where the eggs are essentially held against a light source to check for cracks in the shell.

Is it worth the risk? Although some people go through the process of ear candling without significant injury, the practice requires time and money. There’s also substantial long-term risk.