condition	mean	min	max
4 h after light	6.7868	6.5121400000000005	7.03511
8 h after light	6.725793333333334	6.49948	6.87145
12 h after light	6.5219499999999995	6.40279	6.58397
4 h after dark	6.764626666666667	6.6196	6.88115
8 h after dark	6.727906666666667	6.56423	6.92117
12 h after dark	6.824203333333333	6.59094	6.9596800000000005