That indicates the light coverage on the ground is not symmetrical (in the shape of a circle), but rather has a bow-tie shaped pattern in both the horizontal and vertical planes, relative to the floodlight pole.
The asymmetry can also take other shapes, depending on the light reflector/concentrator within the lamp
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That indicates the light coverage on the ground is not symmetrical (in the shape of a circle), but rather has a bow-tie shaped pattern in both the horizontal and vertical planes, relative to the floodlight pole.
The asymmetry can also take other shapes, depending on the light reflector/concentrator within the lamp
TexMav