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Pigs' need for light. The pig's sense of hearing is quite developed, the sense of smell is also very sensitive, and the vision is relatively weak. So how bad is his eyesight?
For example, the human eye has twice the degree of light sensitivity of the pig's eye. 200Lx is provided to the farm, and only half of the actual pigs receive 100Lx.
Visual deviation: the human eye is a three-dimensional cell can see red, blue and green, pig's eye is a two-dimensional cell pure red light for pigs is a state of night blindness.
Pig's eye characteristics: poor vision
It needs a different light
Visible wavelength peak 380-760nm
Blue light: 460nm
Green: 556nm
Red light (> 650nm) is night blind
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