condition	mean	min	max
4 h after light	7.79177	7.778980000000001	7.81354
8 h after light	8.153343333333332	7.972989999999999	8.28254
12 h after light	8.289943333333333	8.23964	8.35546
4 h after dark	8.314896666666666	8.20519	8.51286
8 h after dark	8.31793	8.15062	8.41671
12 h after dark	7.935546666666666	7.73066	8.193539999999999