condition mean min max 2 h after light 0.0 0.0 0.0 6 h after light 0.0101561 0.0 0.0609366 10 h after light 0.012794383333333333 0.0 0.0767663 14 h after light 0.01470895 0.0 0.0882537 18 h after light 0.0 0.0 0.0 2 h after dark 0.0111294 0.0 0.0667764