condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0540385 0.0 0.108077 4 h after dark 0.0536445 0.0 0.107289 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0