condition	mean	min	max
4 h after light	18.036844	15.60666	20.467028
8 h after light	17.182582	14.866969	19.498195
12 h after light	17.9948345	17.746187	18.243482
4 h after dark	22.111296000000003	19.30478	24.917812
8 h after dark	13.8899305	13.291517	14.488344
12 h after dark	17.249576	17.249576	17.249576