condition mean min max 4 h after light 11.861608 11.344868 12.378348 8 h after light 10.4919275 10.391312 10.592543 12 h after light 10.000521500000001 9.519821 10.481222 4 h after dark 10.063091499999999 9.734871 10.391312 8 h after dark 10.280628499999999 9.970236 10.591021 12 h after dark 10.592543 10.592543 10.592543