condition	mean	min	max
4 h after light	6.7079699999999995	6.59789	6.8412
8 h after light	6.64206	6.45771	6.90194
12 h after light	6.693173333333333	6.54429	6.83033
4 h after dark	6.7571200000000005	6.50965	6.96483
8 h after dark	6.851413333333333	6.572939999999999	7.171360000000001
12 h after dark	6.791370000000001	6.698460000000001	6.9101300000000005