condition	mean	min	max
4 h after light	20.1813	18.8404	21.5222
8 h after light	12.59715	11.8539	13.3404
12 h after light	7.49874	6.89311	8.10437
4 h after dark	5.034565	4.92948	5.13965
8 h after dark	7.684635	7.47951	7.88976
12 h after dark	13.69465	13.5111	13.8782