condition	mean	min	max
4 h after light	15.9541	14.2617	17.6465
8 h after light	16.33425	15.5487	17.1198
12 h after light	14.73675	13.7966	15.6769
4 h after dark	19.882933333333334	18.5681	21.0141
8 h after dark	21.1121	19.6151	22.8352
12 h after dark	17.98453333333333	17.5636	18.3681