condition	mean	min	max
4 h after light	6.750055	6.731	6.76911
8 h after light	6.299645	4.93498	7.66431
12 h after light	6.433335	6.30036	6.56631
4 h after dark	8.155775	7.42197	8.88958
8 h after dark	6.279235	6.15001	6.40846
12 h after dark	8.2233	7.90796	8.53864