condition	mean	min	max
4 h after light	7.79139	7.574739999999999	8.09713
8 h after light	7.94135	7.61602	8.3067
12 h after light	7.874673333333333	7.591069999999999	8.13487
4 h after dark	7.80418	7.51008	8.158339999999999
8 h after dark	7.9591899999999995	7.64267	8.14627
12 h after dark	7.64582	7.63162	7.65787