condition	mean	min	max
4 h after light	21.0308125	20.604445	21.45718
8 h after light	18.987356	18.849372	19.12534
12 h after light	18.76285	18.40036	19.12534
4 h after dark	18.2652455	17.039826	19.490665
8 h after dark	19.362534500000002	17.939353	20.785716
12 h after dark	19.698549	19.698549	19.698549