condition	mean	min	max
4 h after light	18.9034	17.0664	20.7404
8 h after light	18.8791	18.329	19.4292
12 h after light	21.41875	20.7514	22.0861
4 h after dark	23.7691	22.0608	25.4774
8 h after dark	25.5527	25.0541	26.0513
12 h after dark	23.908	23.8627	23.9533