Clear sky and all sky direct luminous efficacies for Florianópolis, Brazil

In the second part of the paper, three models of direct luminous efficacy for all sky types have been evaluated, the first two having been specifically developed for the direct luminous efficacy, whereas and the third was developed for the global luminous efficacy and has been adapted in this paper to characterize the direct luminous efficacy. The statistical evaluation of the three models showed that the last general model has accuracy similar to the two other ones.