condition	mean	min	max
4 h after light	17.486294	16.588952	18.383636
8 h after light	16.028444	15.917843	16.139045
12 h after light	21.095954	20.098882	22.093026
4 h after dark	16.145719	14.956176	17.335262
8 h after dark	16.5214715	16.248572	16.794371
12 h after dark	19.148407	19.148407	19.148407