condition	mean	min	max
4 h after light	8.10243	7.97525	8.21065
8 h after light	8.041823333333333	8.01722	8.07349
12 h after light	8.21148	8.11932	8.27025
4 h after dark	8.115386666666666	8.02313	8.20285
8 h after dark	8.20185	8.13344	8.333039999999999
12 h after dark	8.027696666666666	7.765619999999999	8.33343