condition mean min max 4 h after light 6.7633 6.59668 6.943639999999999 8 h after light 7.046036666666667 6.793710000000001 7.35353 12 h after light 7.02442 6.86521 7.2925 4 h after dark 6.84024 6.657 7.09335 8 h after dark 6.809326666666667 6.614960000000001 7.13525 12 h after dark 6.8274566666666665 6.758710000000001 6.9355199999999995