condition	mean	min	max
4 h after light	8.979926666666668	8.87865	9.03791
8 h after light	7.7520766666666665	7.53885	7.945810000000001
12 h after light	8.17673	7.86947	8.33515
4 h after dark	8.02653	7.90405	8.23996
8 h after dark	8.811313333333334	8.59552	9.042760000000001
12 h after dark	9.291323333333334	9.22558	9.42177