condition	mean	min	max
4 h after light	6.5501233333333335	6.2065	6.76337
8 h after light	6.80393	6.61307	6.902810000000001
12 h after light	6.49829	5.913069999999999	6.81267
4 h after dark	6.8755	6.73815	7.06338
8 h after dark	6.7529433333333335	6.5575600000000005	6.97602
12 h after dark	6.872813333333333	6.81474	6.945130000000001