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Sports Lighting
Outline
•^ Sports^ Lighting
Basics^ ‐^ Mike
•^ Uniformity^ Optimization
Model^ ‐^ Danny
•^ Model^ Results
‐^ Jonathan
Definitions
•^ CANDELA,^ CD:
the^ SI^ unit^ of^ luminous
intensity.^ One^
candela^ is^ one
lumen^ per
steradian.^ Formerly,
candle.
•^ Luminaire:^ A
general^ term^ for
a^ complete
lighting^ unit.^ It
includes^ the^ housing,
the
reflector,^ lens^
and^ lamps.^ (Colloquial
terms
include^ light,^ lantern,
fixture,^ unit,^ instrument,
fitting.)
Definitions
•^ Lumen:^ An^ amount
of^ light^ energy^ within
an^ area.^ The
lumen^ is^ the^ unit^
of^ 'luminous^ flux'^
and^ is^ defined^ as
the^ amount^ of^ light
which^ falls^ on^ one
square^ metre
of^ a^ surface^ at^ a^ constant
distance^ of^ one^ metre
from
a^ source^ of^ one^ candela. • LUMEN,LM:^ SI^ unit
of^ luminous^ flux.^
Radiometrically,
it^ is^ determined^ from
the^ radiant^ power.
Photometrically,^ it
is^ the^ luminous^ flux
emitted^ within
a^ unit^ solid^ angle^
(one^ steradian)^ by
a^ point^ source
having^ a^ uniform^
luminous^ intensity
of^ one^ candela.
Definitions
•^ FOOTCANDLE,
FC:^ the^ unit^ of
illuminance
when^ the^ foot
is^ taken^ as^ the
unit^ of^ length.
It
is^ the^ illuminance
on^ a^ surface^ one
square
foot^ in^ area^ on
which^ there^ is
uniformly
distributed^ flux
of^ one^ lumen,
or^ the
illuminance^ produced
on^ a^ surface^ all
points
of^ which^ are^ at
a^ distance^ of^ one
foot^ from^ a
directionally^ uniform
point^ source^ of
one
candela.
Beam^ Spread,
Wasted^ Light,
and^ Glare docsity.com
Shadows
Beam^ Spread
Football
•^ Combination
of^ aerial^ and^ ground
play^ ‐‐
requires^ ‘adequate’
lighting^ to^50
feet^ above
ground
Photometric
Data
Aiming^ Diagram
View^ from
the^ Top
IES,^1969
•^ “Calculation
methods^ make
it^ possible^ to^ pre
determine^ the
foot^ candle^ (lux)
distribution
provided^ by^ any
given^ aiming^ pattern.
However,^ because
such^ calculations
are^ long
and^ tedious,^ it
is^ general^ practice
to^ base
spotting^ or^ aiming
diagrams^ …^ on
scale^ plots
of^ the^ beam^ spread
and^ the^ area^ to
be^ lighted,
previous^ calculations,
and^ practical
experience…”
