condition	mean	min	max
4 h after light	17.0197175	12.791553	21.247882
8 h after light	20.124050500000003	17.015944	23.232157
12 h after light	19.5411125	15.557261	23.524964
4 h after dark	16.0784975	14.011406	18.145589
8 h after dark	15.095444	14.352763	15.838125
12 h after dark	13.940698	13.940698	13.940698