Luminaire optical assemblies intended for pole-mounted and similar applications
and capable of effective I.E.S. cutoff performance while exhibiting desirable light
distributions even with vertically oriented lamping, the invention contemplates
in primary embodiments light-transmissive reflector/refractor combinations typically
formed of glass, acrylics and the like, uplight shielding and reflector assemblies
of a variety of configurations being disposed within the reflector/refractor combinations
to produce desired cutoff characteristics while preserving daytime appearance during
nocturnal operation. In certain embodiments of the invention, uplight is controlled
by the several variations of the uplight shielding and reflector assemblies to
cause light-transmissive portions of the reflector/refractor combinations to subtly
glow and thus produce a desired appearance while also producing cutoff characteristics
necessary to reduce urban sky glow and glare. The luminaire optical assemblies
further permit achievement of I.E.S. cutoff with vertical tamping while maximizing efficiency.