condition	mean	min	max
4 h after light	8.270813333333333	8.18013	8.41572
8 h after light	8.15476	7.89237	8.29504
12 h after light	8.558523333333333	8.4647	8.62447
4 h after dark	8.83135	8.622869999999999	8.94345
8 h after dark	8.964053333333334	8.66641	9.20624
12 h after dark	9.02864	8.93473	9.17192