condition	mean	min	max
4 h after light	4.133215	3.8794	4.38703
8 h after light	3.58365	3.50243	3.66487
12 h after light	5.08356	4.98579	5.18133
4 h after dark	5.03418	4.7931	5.27526
8 h after dark	4.98803	4.86952	5.10654
12 h after dark	4.914745	4.66851	5.16098