condition	mean	min	max
0 h after light	18.52085	18.0822	18.9595
4 h after light	15.8488	15.1764	16.5212
8 h after light	8.004480000000001	7.74672	8.26224
4 h after dark	22.03715	17.8697	26.2046
8 h after dark	31.5024	31.4429	31.5619
12 h after dark	18.8808	18.7578	19.0038