Floodlights

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Floodlights are broad-beamed, high-intensity artificial lights often used to illuminate outdoor playing fields while an outdoor sports event is being held during low-light conditions.
Floodlights are broad-beamed, high-intensity artificial lights often used to illuminate outdoor playing fields while an outdoor sports event is being held during low-light conditions.

Floodlights are broad-beamed, high-intensity artificial lights often used to illuminate outdoor playing fields while an outdoor sports event is being held during low-light conditions.

Types of floodlight:The most common type of floodlight is the Metal Halide lamp which emits a bright white light, however most commonly used for sporting events are high pressure Sodium floodlights which emit a soft orange light, similar to that of street lights; SON lamps have a very high lumens per watt ratio making them a cost effective choice where certain lux levels have to met.

GE Ultra Sport Lamp [1]
GE Ultra Sport Lamp [1]



Contents

[edit] Luminaire Selection:

Luminaires are available in a variety of beam spreads or NEMA beam types as well as construction types. In the typical layout section, recommended luminaire quantities are listed in the adjacent tables to provide the highest lighting efficiency consistent with uniform lighting.

Luminaires from different manufacturers do not have the same performance characteristics even though they may have the same NEMA beam type.

[edit] Basic lamp type

The basic lamp type used for sports lighting is high intensity discharge (HID). These HID systems primarily use 400W, 1000W and 1500W metal halide or 400W and 1000W high pressure sodium lamps.

While mercury lamps have been used extensively in the past for sports lighting, they are no longer recommended because of their lower efficiency.

The life of HID lamps vary from 1,500 to 24,000 hours.

The most common lamps used today are the 1000 and 1500 watt metal halide lamps. The 1500 watt lamp has the best combination of lamp efficiency (115+ LPW) and life (3,000 hours) for use in most sports lighting venues.

Where longer lamp life or lower mounting heights are desired, 1000 watt metal halide lamps are recommended. Approximately 50% more 1000 watt lamps are required to achieve the same lighting levels as compared to 1500 watt lamps.

This difference increases the cost of installation due to greater quantities and added structural requirements for poles and foundations.

[edit] Warm Up & Restrike Time:

HID lamps require 3-7 minutes to warm up if a momentary power interruption occurs. These lamps require the same amount of time to return to full luminance.

Some form of instant-on lighting, usually one or two incandescent luminaries per pole, is recommended to provide lighting during the 1-15 minute restrike time. In addition, the incandescent (quartz) type fixtures should be used for emergency lighting of the fields when required. HID fixtures with optional “hot lamp restrike” capability are available. This option is for “hot restrike” only and does not provide “instant light” when the fixtures are cold started.

[edit] Also See

[edit] References

  • 1 Wikipedia Reference see Floodlights [2]
  • CHM Industries CHM Sports Lighting [3]
  • International Dark-Sky Association (IDA) — Information Sheet #185Sports and Recreational Area Lighting http:[4][Image:Nps27C7.tmp.pdf]

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