condition	mean	min	max
4 h after light	20.425598	19.524979	21.326217
8 h after light	17.0412775	14.997662	19.084893
12 h after light	18.99954	16.545831	21.453249
4 h after dark	19.1006455	18.151512	20.049779
8 h after dark	19.6929835	19.084893	20.301074
12 h after dark	18.683646	18.683646	18.683646