The temperature and humidity levels required in an incubator depend on the type of eggs being incubated. Here are some general guidelines:

Chicken eggs: The temperature should be maintained at 99.5°F to 100.5°F, and the humidity should be kept at around 50-60% for the first 18 days of incubation. During the last three days, the humidity should be increased to 65-75% to help the chicks pip (break through the shell).

Duck eggs: The temperature should be maintained at 99°F to 100°F, and the humidity should be kept at around 75-80% throughout incubation.

Reptile eggs: The temperature and humidity requirements vary depending on the species of reptile. For example, the temperature for incubating snake eggs should be between 82-86°F with a humidity of 50-60%, while the temperature for incubating turtle eggs should be around 82-88°F with a humidity of 70-80%.

It’s important to note that the temperature and humidity levels should be monitored regularly and adjusted if necessary to ensure optimal incubation conditions for the eggs.