condition	mean	min	max
4 h after light	7.9611633333333325	7.866969999999999	8.147839999999999
8 h after light	8.18733	8.07492	8.32987
12 h after light	8.148806666666665	7.955989999999999	8.43653
4 h after dark	8.131553333333333	7.9483	8.26919
8 h after dark	8.169830000000001	8.00101	8.28195
12 h after dark	8.242963333333334	8.081669999999999	8.55915