This feature packed candler is designed to meet or exceed USDA standards for a human-grader egg candling light. It works for both brown and white eggs. It has three brightness settings and an adjustable mounting bracket, meaning you can really customize your egg candler set up! Two different light sources allow you to candle the eggs and inspect the outside of the eggs to increase grading efficiency. This means that you can easily inspect the eggs for blood spots and cracks at the same time! This candler does work great for eggs that are being incubated, but is intended for grading eggs for eating. LED lights remain cool during candling. This candler plugs into a 120V outlet.