The Application Of High-power Led Sports Field Lighting Fixtures In Sport Court
Directory:
1. Overview of LED lighting fixtures
2. Sports Field Lighting Requirements
3. Implementation of High-Power LED lamps in Sports Lighting
4. Impact of High-Power LED lamps in Sports Lighting
Sports field differ significantly from other venues and have stringent lighting quality requirements. High-power LED lighting fixtures are suitable for sports field lighting, as their overall performance surpasses that of metal halide and fluorescent lamps, leading to reduced electricity consumption and enhanced lighting quality.
1. Overview of LED lighting fixtures
Using high-power LED lighting fixtures for sports field lighting enhances lighting quality, lowers energy usage, and fulfills the lighting demands of various sports events.
1.1 Structure of LED lighting fixtures
The fundamental structure of LED lamps consists of an electroluminescent semiconductor chip, which is secured with silver or white glue, mounted on a bracket, and connected to a circuit board via leads or gold wires. Epoxy resin is used to encase the semiconductor chip, providing protection for the internal wiring. Once sealed, the lamp housing is added to ensure the LED lamp is shock-resistant. LED lamps have a broad range of applications, including household appliances and machinery production.
1.2 Advantages of LED lighting fixtures
LED lamps offer numerous benefits, such as lower energy consumption, minimal environmental impact, and excellent visual performance.
(1) Energy Efficiency: LED lamps consume only 1/10 of the energy of incandescent bulbs and 1/4 of that of energy-saving lamps, according to relevant statistics. They also have a longer lifespan, exceeding 100,000 hours. Unlike energy-saving lamps, LED lamps can be turned on and off quickly and frequently without damaging the filament, making them safer.
(2) Environmental Benefits: LED lamps do not contain harmful substances like mercury, generate minimal heat, and produce no thermal radiation, classifying them as cold light sources. Being solid-state light sources, they are impact-resistant and easy to recycle, minimizing environmental impact and earning them the title of "green lighting sources." They are also easy to transport and install, suitable for any enclosed space, and exhibit good earthquake resistance.
(3) Versatility: As point light sources, LED lamps can be adapted into surface light sources to increase the illuminated area, reduce glare, and provide excellent visual effects without causing eye strain. Given that stadiums host various sports events with differing lighting needs, high-power LED lamps can be intelligently adjusted to meet these requirements and deliver optimal lighting outcomes.
2. Sports Field Lighting Requirements
Stadiums have specific lighting needs that require high standards for their lighting systems. Designers must carefully select lighting fixtures based on the construction criteria of stadiums in our country to fulfill various requirements, such as lighting uniformity, horizontal and vertical illumination, light source color temperature, and color rendering. Among these, horizontal illumination is particularly crucial. When planning Sports Field lighting, designers should focus on the primary design elements based on the sport court lighting requirements and various indicators, categorizing the lighting levels according to the stadium's intended use. This approach ensures that the lighting needs for different sports within the stadium are adequately addressed.
3. Implementation of High-Power LED lamps in Sports Lighting
In recent years, stadiums have begun to upgrade their lighting systems to meet competition standards by incorporating high-power LED lamps. These lamps not only lower energy consumption but also provide better flicker and glare control. The sports field lighting system is quite intricate, and when utilizing high-power LED lamps, certain factors must be considered.
3.1 Flicker Control
Flicker control is a crucial aspect of sports field lighting design. High-power LED lamps generally outperform gas lamps in terms of overall performance. By selecting appropriate high-power LED lamps, the flicker issue can be effectively managed. For instance, a comparison between a specific brand of high-power LED lamps and metal halide lamps revealed that the flicker from the high-power LED lamps is significantly less (refer to Table 1).
Table1
To achieve effective control in sports field lighting design, it is essential to consider the specific circumstances and to carefully choose the appropriate power supply, lamps, and dimmers, while also implementing suitable dimming techniques. When managing flicker in high-power LED lamps, the following points should be noted:
1. Designers should evaluate the stability and ripple suppression ratio of the driver power supply based on the stadium's construction requirements. Utilizing a DC power supply system can help reduce electricity consumption while ensuring stable and safe lighting.
2. For dimming methods, options such as PWM pulse width dimming and digital dimming can be employed. Sports field lighting can be significantly affected by dimmers, leading to issues like driver power supply oscillation and flicker. It is crucial to ensure compatibility between the equipment and dimming methods to effectively minimize flicker. The leading edge phase control dimming method is commonly used with high-power LED lamps in stadiums.
3. The compatibility of lamps, driver power supplies, and dimmers is vital for controlling flicker in high-power LED lamps. When implementing high-power LED lamps in sports court lighting, it is important to select dimmers and driver power supplies that align with the sports field lighting requirements, ensuring compatibility with the high-power LED lamps to mitigate flicker issues.
For instance, in a sports field lighting system design, if the designer does not choose an appropriate driver power supply and thyristor dimmer based on the actual conditions, flicker may occur frequently during testing. However, by optimizing the compatibility between high-power LED lamps, dimmers, and driver power supplies, the flicker issue can be resolved, thereby enhancing the quality of the sport court lighting.
3.2 Glare Management
To maintain high-quality lighting in stadiums, it is essential to manage glare. When selecting high-power LED lights for stadiums, it is advisable to choose silicon-based LED lamps that offer effective heat dissipation. Additionally, these lamps should be positioned at a safe distance from the driver to ensure their safety. The driver should be centrally located within the high-power LED driver box, and a light effect adjustment control device should be utilized for support. Both built-in and external devices must be equipped with frosted anti-glare lampshades. Each lamp bead should have a separate lens, and the shading angle should be adjusted based on the brightness of the lamp bead, utilizing diffuse reflection to mitigate glare effectively.
In the design of a specific sports field lighting, high-power LED lamps were employed to lower the glare index for that venue to approximately 29.3 which is below the glare limit of 30. Although the glare index exceeded the limit during pre-match training, feedback from athletes indicated that the glare did not significantly affect lighting quality, and no further adjustments were necessary.
3.3 Smart Dimming Control
Stadiums are large and serve various functions, each with distinct lighting requirements. To enhance energy efficiency in sports field lighting, high-power LED lamps should be utilized alongside a comprehensive DALI digital dimming system that incorporates intelligent dimming control. This involves installing DALI dimming ballasts in suitable locations for the high-power LED lamps and integrating DALI gateway devices into the sport court lighting system to enable remote dimming, scene switching, lamp status monitoring, fault diagnosis, and other functionalities, ensuring optimal lighting quality.
With intelligent dimming control, designers can manage the operation modes and parameters of high-power LED lamps based on real-time conditions. The DALI digital dimming system allows for lighting control according to predefined methods, which can reduce the operational time of sports field lighting and lower energy consumption. For instance, using localized lighting control, individual or multiple high-power LED lamps can be activated to illuminate specific areas without needing to power the entire lighting system in the venue.
High-power LED lighting fixtures can be connected in groups of 3 to 4 on the same circuit, unlike metal halide and energy-saving lamps, which require individual circuits for each lamp at the distribution box. This eliminates the need to adjust the size of the electrical box or install numerous outgoing line switches, thereby simplifying the sports field lighting system and enhancing its functionality.
3.4 Lighting Distribution Control
To ensure the safe and stable operation of sports field lighting with high-power LED lighting fixtures, careful design of the lighting distribution is essential. Factors such as the lighting level of the venue, the type of sports building, and the nature of the events must be taken into account. A lighting distribution plan should be developed in accordance with relevant standards to ensure effective lighting distribution. For instance, during major sporting events, a combination of 50% mains power and 50% generator power can be utilized, with additional temporary generators on standby to maintain stable lighting power distribution.
4. Impact of High-Power LED lighting fixtures in Sports Field Lighting
The benefits of high-power LED lamps in sports field lighting are significant, as they enhance lighting quality while reducing energy consumption. Traditional sports field lighting systems typically use metal halide lamps, which, although adequate for lighting needs, are energy-intensive. With advancements in lighting technology, various lamp types have emerged, and high-power LED lamps are increasingly replacing metal halide lamps due to their energy-saving properties and minimal environmental impact.
High-power LED lamps can address traditional issues such as halo effects and heat dissipation when equipped with the appropriate technology, making them popular among some stadiums. They can fulfill various functional requirements, allowing for localized lighting without needing to activate the entire system. Venue designers should consider the specific characteristics of the venue and strategically position the lamps to achieve optimal lighting results.
Although high-power LED lamps are more costly than traditional options, they offer superior light efficiency and require little to no maintenance. They are highly adaptable and stable for Sports Field lighting, capable of producing multi-color light emissions to meet diverse lighting needs. The use of high-power LED lamps enhances visual quality, minimizes stroboscopic effects, and improves glare reduction.