condition	mean	min	max
4 h after light	11.7	11.7	11.7
8 h after light	21.35	16.1	26.6
12 h after light	34.35	31.1	37.6
4 h after dark	52.05	34.8	69.3
8 h after dark	45.2	37.6	52.8
12 h after dark	20.7	20.4	21.0