condition	mean	min	max
4 h after light	7.5611985	7.360283	7.762114
8 h after light	7.8757395	7.841443	7.910036
12 h after light	8.0460385	7.820455	8.271622
4 h after dark	7.5337445	7.305375	7.762114
8 h after dark	7.640149	7.459843	7.820455
12 h after dark	8.630639	8.630639	8.630639