condition	mean	min	max
4 h after light	6.194376666666667	6.07566	6.36076
8 h after light	6.51841	6.40947	6.66977
12 h after light	6.2629	6.1348199999999995	6.37793
4 h after dark	6.31866	6.15751	6.51807
8 h after dark	6.24637	6.09807	6.37252
12 h after dark	6.172493333333333	6.0843	6.3251599999999994