Symmetry
Horizontal photometric distribution of the luminaire. You can imagine these diagrams as if you are looking down on the light distribution pattern on a floor.
Axial
Select this if the luminaire has the same distribution at all horizontal angles (like a circle).
Quadrilateral
Select this if each quarter of the luminaire has the same light distribution (like a rectangle).
Bilateral
Select this if the light distribution of the luminaire is mirrored left to right but is different front (street) to back (house).
None
Select this if the luminaire light distribution has no photometric symmetry.
