condition	mean	min	max
4 h after light	28722.7	28722.7	28722.7
8 h after light	28927.35	28892.9	28961.8
12 h after light	22957.3	21390.3	24524.3
4 h after dark	18556.4	17973.0	19139.8
8 h after dark	18864.8	15159.5	22570.1
12 h after dark	22207.6	20104.6	24310.6