
Light Distribution Angle
Lighting distribution angle refers to the spread of
light emitted from a light source. It is an important
factor to consider when selecting a fixture or
bulb, as it aects the way it will illuminate an area.
There are two main types of lighting distribution
angles: A symmetric lighting distribution emits
light evenly in all directions, creating a cone-
shaped pattern that provides a pool of light. This
type of lighting is ideal for general lighting and
illuminating large areas. Common applications for
symmetric lighting include general area
illumination, security lighting, and perimeter
lighting. Symmetric lighting is also used to a
certain degree in up-lighting. An asymmetric
lighting distribution angle, also known as beam
angle, creates a pattern that focuses light in a
specific direction. This type of lighting is ideal for
task lighting as it reduces glare and light spill in
other areas. Common applications include task
lighting in spaces such as landscape settings,
retail stores, museums, and much more. It is
important to note that the lighting distribution
angle can also be aected by other factors such
as the reflector design of the light source, the type
of lens used, and the distance between the light
source and the surface being illuminated.
7
UNIT:cd
AVERAGE BEAM ANGLE (50%): 119.7 DEG
Luminous Intensity Distribution 1
C/
C/
.°
.°
0
30
60
90
120
150-150
-120
-90
-60
-30
0
156
312
468
624
780