A source of bright cool light is important as well as a dark room being mandatory. We candle our Peafowl Eggs three times before hatch. We candle on the 7th day to determine infertile eggs.We candle on the 14th day and remove any eggs containing chicks that have experienced early death. We candle on the 21st day to remove any eggs containing chicks that have experienced late death. The dangers to avoid in candling are: 1. Dirty hands 2. Damaging the eggs by accident 3. Eggs becoming to cold 4. Nest abandonment if using a setting hen.