condition	mean	min	max
4 h after light	21.328056	19.02916	23.626952
8 h after light	21.6097885	17.803069	25.416508
12 h after light	16.4967545	16.189941	16.803568
4 h after dark	14.791253000000001	13.898268	15.684238
8 h after dark	15.352553	12.675709	18.029397
12 h after dark	15.094793	15.094793	15.094793