condition	mean	min	max
4 h after light	17.9405715	16.367543	19.5136
8 h after light	18.8217595	16.754999	20.88852
12 h after light	23.4459715	22.569712	24.322231
4 h after dark	19.827014	19.067032	20.586996
8 h after dark	20.7662015	19.660426	21.871977
12 h after dark	19.498195	19.498195	19.498195