condition	mean	min	max
4 h after light	8.917513333333334	8.86201	8.97482
8 h after light	8.61843	8.52244	8.77431
12 h after light	8.776236666666668	8.43838	9.11191
4 h after dark	7.8009699999999995	7.4920800000000005	8.11409
8 h after dark	8.256833333333333	8.12655	8.45662
12 h after dark	8.4531	8.17972	8.67865