condition	mean	min	max
4 h after light	17.6303	12.7886	21.552
8 h after light	15.959626666666665	6.31558	20.7886
12 h after light	16.365000000000002	11.483	21.6659
4 h after dark	28.279533333333333	24.8737	31.0348
8 h after dark	20.419	13.6548	28.845
12 h after dark	18.417733333333334	16.302	20.8641