How to Reduce Glare Light For Your Stadium Lighting Project

How to Reduce Glare Light For Your Stadium Lighting Project

With the improvement of people's entertainment standard of living, more and more professional events take place at night, for the stadium lighting, the glare light value is one of the decisive factors to test the lighting effect, low glare value can not only improve the sensory experience of the players, so that the players play the best level, and can improve the viewing experience of the audience, so how is the glare generated? What can be done to reduce glare on the pitch? This blog will give you the details.

I. The dangers of high glare levels on stadium lighting

If stadium lighting glare levels are too high, it will affect players' visual perception and visibility. For balls such as softballs and badminton flying through the air, players will have a blurred feeling and their eyes will not be able to accurately catch the ball flying through the air, focus on the image and track the ball's flight path to make an accurate prediction of where the ball will land. When the stadium lighting’s glare energy is too high and the level of glare hazard is severe, the blinding light can cause visual pain to spectators and players. Not only does the human eye feel a strong sting, but even when the eye field of view leaves the lighting surface, it still produces a visual blackout for a short period of time. The degree of discomfort depends on several factors: the brightness and size of the glare source, the position of the glare source in relation to the line of sight and the background brightness of the viewing glare source.

I. How is the value of glare defined?

Glare is a subjective sensation and it is impossible to predict the value of glare in a given environment and whether a person will feel the light blindingly. Therefore only quantitative values can be used to predict whether a luminaire will glare or not in the above environment.

UGR - Uniform Glare Rating

The Uniform Glare Rating, or UGR, is a psychological measure of the subjective response of light emitted by a lighting fixture in a visual environment that causes discomfort to the human eye. In order to calculate this value correctly, taking into account all the circumstances of your court lighting, Romanso offers the DIALux lighting design tool to design your lighting scheme, detailing the specific glare values for each area in different installation situations.

(International Commission on Lighting) for assessing and limiting the psychological effects of direct glare from luminaires. Instead of using the brightness value of a single luminaire to assess the glare index of the glare, this method calculates the glare of the entire lighting installation at a specified location. A modern lighting design program such as Dialux can be used to accurately calculate the UGR value for a specified location within the course. The lower the UGR value, the lower the glare. Areas adjacent to each other can create glare which can make players and spectators feel uncomfortable.
Currently, many customers are only concerned that the luminaire needs to provide enough light, even the higher the better, however, it can cause more light to be directed into your eyes than to be reflected from the ground, making it difficult for players to move. If a lampshade is present on the luminaire, it will prevent the light from going directly into the player's eyes, while brightly illuminating the court area and effectively reducing the glare value. The larger the illuminated area of the luminaire for the same luminous flux, the less glare will be perceived. In this case, it is also possible to compare spotlights and pitch lights. If both luminaires have a luminous flux of 20,000 lm, the professional pitch light will appear less harsh if the light distribution is the same, because the luminaire is designed to illuminate a larger area, emitting a larger and more uniform range of light, which effectively reduces the UGR factor.

I. How to effectively reduce glare values

1. Number of luminaires and mounting positions

When designing the lighting layout of a court, it is important to consider the installation position, tilt angle and number of installations. In general, the higher the lights are placed, the lower the glare will be. To reduce glare, keep the light source high and out of direct contact with the spectators and players' career view. Also, if we reduce the brightness of the light source by a moderate amount and increase the number of light sources so that the light is evenly distributed, glare can also be effectively reduced and will not reduce the illumination level of the pitch. For example, an installation of 100 low-wattage pitch lights will have the same illumination level as 70 high-wattage pitch lights, but it will have a more even background illumination and a lower glare constant.

2. However, whether a luminaire is perceived as harsh or not does not depend on the luminaire itself, but also on the environment and arrangement of the luminaire. In this case, the effect of direct and indirect lighting is also a key factor. In pitches where the field strongly reflects light, a higher percentage of individual light can occur, causing a glare effect, so it is also important to adjust the angle at which the light is emitted from the ground in a sensible way, moving the direction of the beam angle or repositioning the light so that it does not shine directly into the eye or reflect on the surface.

2. The design of the lighting itself can also effectively reduce the glare value, Romanso's LED sports lighting products use reasonable light distribution design, to achieve effective control of light, using advanced optical technology to reduce the glare light, spill light and upward light. And for different sports fields and courts characteristics to design different sports lamps to meet the specific requirements.

If you have a sports lighting project at hand, we can offer you the DIALux lighting solution. The detailed number of lamps, installation positions, height, beam angles, illuminance, uniformity, glare rating, etc. to meet your lighting effects and detailed requirements.

Conclusion

Glare light is an unavoidable side effect of lighting, but we can eliminate it by adjusting the choice of lamps, their placement, their height, the number of lamps and lighting solution design as well as using the narrow beam angles and asymmetric light.

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