condition	mean	min	max
4 h after light	15.99445	12.7272	19.2617
8 h after light	9.93697	9.91736	9.95658
12 h after light	13.1244	12.0247	14.2241
4 h after dark	19.5063	18.7281	20.3033
8 h after dark	22.035833333333333	21.5909	22.8501
12 h after dark	19.8663	19.5354	20.3162