| CPC F21V 33/0076 (2013.01) [F21V 5/045 (2013.01); G02B 3/0043 (2013.01)] | 15 Claims |

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1. A lens for a visual alert system adapted for mounting on either of a vertical or a horizontal surface, comprising:
a combination of optical features configured to throw light 180 degrees along a first orientation and 180 degrees along a second orientation, wherein the second orientation is perpendicular to the first orientation, comprising a first optical feature with a unique geometry and one or more pairs of optical features, wherein each of the one or more pairs of optical features comprises two optical features with a shared geometry wherein one of the two optical features is rotated 90 degrees relative to the other; and
one or more surfaces supporting the optical features and forming a thickness.
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