Energy-saving research on the application of new light sources in tunnels has attracted the attention of the industry, and there have been significant advances in energy-saving research on LED tunnel lights. Because according to scientific research results such as the relationship between bright vision and intermediate vision theory, color rendering and illuminance, LED has inherent advantages in tunnel lighting, so there are many important tunnel lighting projects in China that use LED tunnel lights. The application of LED tunnel luminaires in tunnel lighting projects has made breakthrough progress, but there are still problems, for example, there is no specific design and construction specification for tunnel luminaires with LEDs as light sources, and product performance is uneven.
This article will analyze the key technical indicators that need attention in the LED tunnel lighting project, hoping to provide reference for design units and users.
Optical Part LED Luminous Efficiency The LED single-lumen lumen output is the basic indicator to determine whether the LED tunnel lamp has practical value. According to the requirements of the actual use of the LED tunnel lamp, the LED single-lumen lumens used by the LED tunnel lamp should reach 90 lumens. After the rapid development of LED luminous efficiency in 2006 and 2007, famous brands such as CREE, Lumileds, and Hong Kong Neo-Neon have all introduced the latest LED models one after another.
Secondary Light Distribution Light Distribution Types The current common light distribution types include concentrating light distribution, side-shooting light distribution, and lambertian light distribution. Different applications can be applied to different types of light distribution. For example, bat-wing light distribution for road lighting and concentrating light for spotlights should be used. Due to the particularity of tunnel lighting, the arrangement density of the lamps in the tunnel lighting is very high, so the secondary light distribution of the lamps in the tunnel lighting is different from the general road lighting. In the tunnel lighting, the bat airfoil light distribution and Lambertian light distribution can all meet the requirements of illumination uniformity. This is mainly due to the fact that the distance between the lights in the tunnel lighting is relatively small. For example, the mid-section distance of a domestic tunnel lighting project is only 5 Meter.
The tunnel light of Hong Kong Neo-Neon 75 uses the bat-airfoil light distribution that is commonly used in current road lighting and tunnel lighting, and the domestic LED tunnel light is Lambertian light distribution.
The specificity of the light distribution design Although the requirements for the distribution of the light distribution in tunnel lighting are relatively relaxed, there must be a light distribution design. Since the light distribution design is based on the primary light distribution of the light source, different light source types have different distributions, and the corresponding light distribution design will also change. So although there are professional reflectors, lens design and production manufacturers, but they provide only a certain type of LED light source for the design basis, of course, can only be suitable for a certain kind of LED light source. Moreover, the types of LED light sources are rapidly increasing. In the upgrading of LEDs, reflectors and lenses are also required to be replaced. Therefore, the secondary light distribution design must be completed by the tunnel light manufacturers themselves. However, there are not many manufacturers that can independently carry out light distribution design.
The selection of light-matching surface types is generally more commonly used surface types: spherical, ellipsoidal, hyperboloidal, paraboloidal, freeform surfaces, of which freeform surfaces are the most widely used and most widely applicable. In addition, planes are used in the light distribution, but the plane usually only plays a transitional role—the extension of the light source, and cannot play a real light distribution role. For example, the distribution of a certain LED tunnel lamp in the country is to select the plane as the light distribution surface type, so the final distribution of light distribution is actually the distribution of the light distribution of the LED. There is no strict matching in the LED tunnel light. Light.
The pre-judgment of lighting effects has a pre-judgment for the lighting effect and installation of the luminaires in tunnel lighting. Usually, we need to use the basic parameters of the construction site and the photoelectric test data of the luminaires (eg, IES format files) beforehand. Simulation analysis is performed in the lighting software to evaluate the effects of lighting and determine the best parameters for installation.
If the result of the simulation analysis is not ideal, then it is necessary to modify the light distribution design or adjust the power of the lamps. At present, Hong Kong Neo-Neon has the ability to complete the entire process from light distribution design, optical-grade mold making, photoelectric test analysis to engineering effect design and analysis.
This article will analyze the key technical indicators that need attention in the LED tunnel lighting project, hoping to provide reference for design units and users.
Optical Part LED Luminous Efficiency The LED single-lumen lumen output is the basic indicator to determine whether the LED tunnel lamp has practical value. According to the requirements of the actual use of the LED tunnel lamp, the LED single-lumen lumens used by the LED tunnel lamp should reach 90 lumens. After the rapid development of LED luminous efficiency in 2006 and 2007, famous brands such as CREE, Lumileds, and Hong Kong Neo-Neon have all introduced the latest LED models one after another.
Secondary Light Distribution Light Distribution Types The current common light distribution types include concentrating light distribution, side-shooting light distribution, and lambertian light distribution. Different applications can be applied to different types of light distribution. For example, bat-wing light distribution for road lighting and concentrating light for spotlights should be used. Due to the particularity of tunnel lighting, the arrangement density of the lamps in the tunnel lighting is very high, so the secondary light distribution of the lamps in the tunnel lighting is different from the general road lighting. In the tunnel lighting, the bat airfoil light distribution and Lambertian light distribution can all meet the requirements of illumination uniformity. This is mainly due to the fact that the distance between the lights in the tunnel lighting is relatively small. For example, the mid-section distance of a domestic tunnel lighting project is only 5 Meter.
The tunnel light of Hong Kong Neo-Neon 75 uses the bat-airfoil light distribution that is commonly used in current road lighting and tunnel lighting, and the domestic LED tunnel light is Lambertian light distribution.
The specificity of the light distribution design Although the requirements for the distribution of the light distribution in tunnel lighting are relatively relaxed, there must be a light distribution design. Since the light distribution design is based on the primary light distribution of the light source, different light source types have different distributions, and the corresponding light distribution design will also change. So although there are professional reflectors, lens design and production manufacturers, but they provide only a certain type of LED light source for the design basis, of course, can only be suitable for a certain kind of LED light source. Moreover, the types of LED light sources are rapidly increasing. In the upgrading of LEDs, reflectors and lenses are also required to be replaced. Therefore, the secondary light distribution design must be completed by the tunnel light manufacturers themselves. However, there are not many manufacturers that can independently carry out light distribution design.
The selection of light-matching surface types is generally more commonly used surface types: spherical, ellipsoidal, hyperboloidal, paraboloidal, freeform surfaces, of which freeform surfaces are the most widely used and most widely applicable. In addition, planes are used in the light distribution, but the plane usually only plays a transitional role—the extension of the light source, and cannot play a real light distribution role. For example, the distribution of a certain LED tunnel lamp in the country is to select the plane as the light distribution surface type, so the final distribution of light distribution is actually the distribution of the light distribution of the LED. There is no strict matching in the LED tunnel light. Light.
The pre-judgment of lighting effects has a pre-judgment for the lighting effect and installation of the luminaires in tunnel lighting. Usually, we need to use the basic parameters of the construction site and the photoelectric test data of the luminaires (eg, IES format files) beforehand. Simulation analysis is performed in the lighting software to evaluate the effects of lighting and determine the best parameters for installation.
If the result of the simulation analysis is not ideal, then it is necessary to modify the light distribution design or adjust the power of the lamps. At present, Hong Kong Neo-Neon has the ability to complete the entire process from light distribution design, optical-grade mold making, photoelectric test analysis to engineering effect design and analysis.
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