Exterior Lighting 2012/2013 - Fergin AB

Rotationally symmetrical reflectors
The light distribution of rotationally symmetrical
reflectors is the same in all planes. Therefore the
beam angle in one plane is sufficient to describe
the characteristics of a reflector.
Example 1:
Rotationally symmetrical medium
or wide beam
Rotationally symmetrical medium or wide beam
reflectors are suitable for the uniform illumination of
symmetrical surfaces, e.g. circular or square signs.
Example 2:
Rotationally symmetrical medium
or wide beam
In situations where vertical surfaces, e.g. banners,
along a facade are to be illuminated, rotationally
symmetrical medium or wide beam floodlights
should be used as they create a uniform light cone.
The uniformity can be increased by mounting the
floodlight on an arm.
Example 3:
Rotationally symmetrical narrow beam
A facade detail is to be accentuated from a long
distance. Rotationally symmetrical narrow beam
spotlights are used to project light of high intensity
over greater distances.
Example 4:
Rotationally symmetrical narrow beam
The luminaires are to be mounted on a facade to
provide accent lighting. Rotationally symmetrical
narrow beam reflectors create intensive bands of
light along the facade and thus highlight the
architectural features.
C 90 – 270
C 0 – 180
Nightscape 87
Nightscape