condition	mean	min	max
4 h after light	8.593356666666667	8.5046	8.637960000000001
8 h after light	8.682413333333333	8.615169999999999	8.78364
12 h after light	8.778913333333334	8.6729	8.83597
4 h after dark	8.958926666666667	8.84804	9.016960000000001
8 h after dark	9.02803	8.95738	9.10201
12 h after dark	9.03952	9.01197	9.08601