In further testing of the model, the field experiment’s analysis also revealed very strong statistical correlations between the participants' responses and the model’s predictions for the study’s two questions (Figure 6).

In both cases, the correlation between the two sets of ratings was high and positive, indicating that the mathematical model provides reasonably accurate predictions regarding the perceived brightness and safety under outdoor lighting in parking lots. These results indicate that the uniformity of illumination is a very strong predictor of perceived safety.