Frequency of comfort temperature and humidity in the early phase of swine in different lighting programs during the winter and summer.

The current work sought to evaluate the frequency of comfort temperature and humidity for pigs in farms during the nursery phase with artificial lighting programs during winter and summer. The dry bulb temperature data (DBT) and relative air humidity (RH) were obtained with a multifunction device, model TESTO® 410-2. These variables were collected one day / week at intervals of 3 hours, both inside and outside the nursery, totaling 5 days collection in the course of each repetition. In general, the average temperature was higher in programs 23L, 1E and 16L:8E. The average weekly relative humidity values showed a behavior opposite to the TBS. The cause of the rise in temperature was not well understood and may have been as a result of the heat generated by lights, greater agitation of the animals which in turn generated more heat, variation of bell-jars or other factor that could not be observed in this study.