condition	mean	min	max
4 h after light	7.164005	6.51341	7.8146
8 h after light	7.21875	7.01117	7.42633
12 h after light	7.659644999999999	7.21225	8.10704
4 h after dark	9.593029999999999	9.38242	9.80364
8 h after dark	9.176545	8.90525	9.44784
12 h after dark	9.027105	8.99952	9.05469