Candling monitors the development of the embryo within the egg allowing infertile eggs to be removed before they become infected and contaminate others.

Egg candling also monitors the rate of enlargement of the airspace within the egg as a gauge of incubation humidity and for more detailed analysis of development such as vein growth.

Brinsea has four models of candling lamps available:
The OvaView egg candler Standard and High Intensity or
The OvaScope egg scope Standard and High Intensity.