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All poles(and fixtures)should be be tested through computer simu- When there are more than just a
<br /> out of lines of play,to prevent glare lation, which most manufacturers few, however, rely on manufac-
<br /> •
<br /> that could cause players to lose can perform. The printout shows turers'aiming diagrams,as we did.
<br /> dills of the ball. For baseball and what the light levels will be at vari- A variance of even a few degrees
<br /> softball,principal lines of sight are ous points,to help check for accura- from recommendations can have
<br /> •
<br /> those between pitcher and batter, cy.These usually show initial,rather significant impacts on lightingr acc •
<br /> ura- from recommendations can havthan maintained, footcandles. els and uniformity, particularly
<br /> Accordingly, and as shown in • Provide proper aiming:Once the when narrow beam spreads(NEMA
<br /> Figure 1,we opted for two poles be- fixtures are mounted,they must be 1, 2 and 3) are involved.
<br /> hind and at either side of home properly aimed to ensure uniform OPERATING COST FACTORS
<br /> plate(A poles)to light the ball as it lighting. When only a few fixtures The cost of our lighting came to
<br /> comes to the batter; two poles be- are used, they often can be aimed about $25,000, elevated somewhat
<br /> hind and further down the home- at dusk on a trial-and-errdr "eye- by the need to put power wiring un-
<br /> to-first and home-to-third base ball" basis.
<br /> paths (B poles), aimed along the (Continued on next page)
<br /> baselines and up to the fringe of the
<br /> outfield, to illuminate the ball as it
<br /> is hit; and four poles beyond the
<br /> outfield (C poles), away from prin- ^ �_
<br /> cipal sight lines. — ,, . ,
<br /> • Selecting mounting heights: � \\
<br /> Mounting height should be select- NE
<br /> ed so that the light sources are IN SCOPE gO k 1 I
<br /> above the line of sight, to prevent
<br /> glare;optimum height will be deter-
<br /> mined by lamp output.
<br /> We selected 1,500-watt lamps i _; ` •
<br /> 4.
<br /> rather than smaller ones, so we ,,......d«.s+-� f'tip
<br /> would need fewer lamps to provide
<br /> the same light output. In addition, ill
<br /> larger lamps tend to be more effi- --f f t,
<br /> nt(more lumens of light output � L
<br /> r each watt of power required). fAM FA -PLA j jam -; I ,
<br /> Given the lamps'light output,we 4
<br /> chose to mount the lamps 70 feet
<br /> high on 85-foot poles. The fixtures
<br /> were mounted on crossarm adapt- ..***0 -
<br /> ers fastened to the top of L-shaped �, �xa '
<br /> brackets.
<br /> • Select fixtures: There can be
<br /> major differences in fixtures, so WE KNOW In the past three years, '
<br /> Fair Play has installed
<br /> selections must be made with care.
<br /> Some produce far more light than THE more sponsored
<br /> others; some are sturdier than scoreboards and message
<br /> others, or provide more resistance SPONSORSHIP centers than all the other
<br /> to the buildup of dirt and dust. CAMEscoreboard companies
<br /> A major concern is beam spread, combined. From large,
<br /> meaning the width (in degrees) of INSIDE OUT custom designed boards
<br /> the beam of light produced. Beam '`
<br /> spread is rated according to stan- on down, Fair Play is the
<br /> dards established by the National name to remember in
<br /> Electrical Manufacturers Associa-
<br /> tion (NEMA), based on a scale of 1 ,�1I��%/ So, if you're about to
<br /> to 7.The higher the NEMA number = acquire a sponsor-
<br /> the wider the spread. fflIFITHY SCOREBOflROS financed scoreboard, talk
<br /> In our design, we have five fix- iii���� to Fair-Play first. You'll
<br /> tures on each of the two A poles, come out the big winner.
<br /> seven on each of the two B poles, Box 1847-AB
<br /> five on two of the C poles and four Des Moines, Iowa 50306
<br /> ite other two. In each case, we (515) 265-5305
<br /> a combination of NEMA 3, 4
<br /> AMERICA'S SCOREKEEPER FOR OVER 50 YEARS
<br /> and 5 beam spreads.
<br /> • Test assumptions: Once the de-
<br /> sign has been completed,it should 4
<br /> ATHLETIC BUSINESS,May, 1987 Circle 31 on the Information Request Card
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