condition	mean	min	max
4 h after light	7077.7	7077.7	7077.7
8 h after light	7678.1	7397.7	7958.5
12 h after light	7537.75	7184.0	7891.5
4 h after dark	6489.85	6050.6	6929.1
8 h after dark	6241.55	5417.0	7066.1
12 h after dark	6728.25	6517.3	6939.2