condition mean min max 4 h after light 1.538955 0.0 3.07791 8 h after light 0.9722605 0.831241 1.11328 12 h after light 0.507605 0.0 1.01521 4 h after dark 0.0 0.0 0.0 8 h after dark 0.2223355 0.0 0.444671 12 h after dark 0.806362 0.737169 0.875555