condition	mean	min	max
4 h after light	21.035461	19.187104	22.883818
8 h after light	16.66236	16.387817	16.936903
12 h after light	15.736199000000001	13.326273	18.146125
4 h after dark	17.431432	16.750188	18.112676
8 h after dark	18.3642375	14.364255	22.36422
12 h after dark	19.16003	19.16003	19.16003