condition	mean	min	max
4 h after light	18.85105	17.5498	20.1523
8 h after light	16.2964	13.9825	18.6103
12 h after light	19.31255	17.3054	21.3197
4 h after dark	21.4752	21.3492	21.6012
8 h after dark	19.79735	19.6173	19.9774
12 h after dark	18.3179	17.7914	18.8444