condition	mean	min	max
4 h after light	18.01365	16.9633	19.064
8 h after light	14.391100000000002	13.6834	15.0988
12 h after light	13.15935	12.8746	13.4441
4 h after dark	18.815366666666666	17.6504	19.7139
8 h after dark	21.7135	20.3029	24.0876
12 h after dark	21.729766666666666	19.7909	25.2035