condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.01657935 0.0156025 0.0175562 4 h after dark 0.0 0.0 0.0 8 h after dark 0.007340033333333333 0.0 0.0220201 12 h after dark 0.0 0.0 0.0