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Photometric Performance—Traditional sports lighting
systems use metal halide lamps with large bulb jackets and mogul
base sockets located in the axial center-line of the optical. This
lamp design impedes optical efficiency by producing inefficient
symmetrical light distributions with too much light in the upper
beam. Some upper beam light is lost in the sky and grandstands or,
in the worst case, can be the source of light trespass and glare.
The Ultra
★★
★★
★Sport floodlight, on the other hand, utilizes an
advanced double-ended metal halide lamp without a bulb jacket
and a new unique reflector design.
The elimination of the outer bulb allows placement of the lamp
arc into the focal point of shallow parabolic reflector forms
needed to build high center beam candle power and provide the
highest beam efficiency possible with wide beam distributions.
This new lamp/reflector configuration produces a more
efficient, oval light distribution with very tight vertical light control
to minimize wasted light and maximize light on the playing field.
Glare/Spill Light Control—The Ultra
★★
★★
★Sport floodlight’s
precise optical design limits the amount of vertical spill and light
pollution without the use of external visor/louver assemblies that
increase wind loading and structure costs. Optional internal cutoff
skirts are available and provide direct cutoff of the arc tube at 15
degrees above the floodlight’s center aiming point for optimum
glare control without the high losses normally associated with
external glare reducing devices.
Photometric Choices—Different combinations of primary and
secondary reflectors, in conjunction with the new double-ended
lamp, provide multiple oval light distributions.
7
Ultra
✭
Sport
TM
Floodlight
W01
WW1
S01
M01
Beam
Efficiency
= 53%
Total
Efficiency
= 86%
Beam
Efficiency
= 54%
Total
Efficiency
= 85%
Beam
Efficiency
= 65%
Total
Efficiency
= 84%
Beam
Efficiency
= 70%
Total
Efficiency
= 84%
e
S01 =Stadium oval without internal glare control
(NEMA 4X2)
S02 =Stadium oval with internal glare control
(NEMA 4X2)
M01 =Medium oval without integral internal glare control
(NEMA 4X2 [64x24])
M02 =Medium oval with integral internal glare control
(NEMA 4X2 [70X24])
W01 =Wide oval without integral internal glare control
(NEMA 5X3 [81X38])
W02 =Wide oval with integral internal glare control
(NEMA 5X3 [81X37])
WW1 =Extra wide oval without internal glare control
(NEMA 5X4)
WW2 =Extra wide oval with internal glare control
(NEMA 5X4)