condition	mean	min	max
4 h after light	19.42285	17.8561	20.9896
8 h after light	18.71445	18.2605	19.1684
12 h after light	30.0059	29.108	30.9038
4 h after dark	38.1105	37.5746	38.6464
8 h after dark	32.02865	31.6242	32.4331
12 h after dark	28.6809	28.1892	29.1726