Watch the growth and development of fertilised eggs with this Rooster Farms LED AU Plug Egg Candler Lamp, designed for safe and easy monitoring during incubation. This unit includes two interchangeable viewing heads for different egg sizes and clearer observation. Egg candling is a non-invasive method used during incubation to check whether an egg is developing. When viewed through the candler, visible veins or dark spots can indicate that the egg is viable and that an embryo is developing. This device is suitable for educational use, hobbyists, and students learning about the incubation process.