Tunnel lighting requirements
       Tunnel lighting is usually divided into lighting, interior lighting and exit lighting, which is very strict requirements of the lighting of the entrance, the requirements from the same brightness gradually decreased. The international lighting Society (CIE) divides the tunnel entrance lighting into (from the tunnel port) threshold and the transition section. The threshold segment is to eliminate the "black hole" phenomenon, so that the driver can clearly identify obstacles at the entrance to the cave. The inner segment is the area of the tunnel which is far from the external natural lighting. The vision of the driver is only affected by the illumination of the tunnel. The characteristics of the internal segment is intact with uniform lighting level. Exports should be reduced by light to avoid glare.

Necessity of tunnel lighting energy saving
       The development of highway construction, at present, the mileage of highway tunnel construction in our country has exceeded 2550km. At the same time, 24 hours continuous tunnel lighting and daytime than at night luminance requirements higher, operation energy consumption and product life has become increasingly prominent, to build safe and harmonious traffic environment constitute a serious impact.
      Chongqing City, for example, a total of more than 200 existing highway tunnel, for this year will spend nearly 300 million yuan per year lighting electricity, a considerable. Road tunnel lighting electricity and lighting costs have become a huge burden on the operating unit. The main factors that affect the power consumption of highway tunnel lighting are lighting efficiency, lighting layout mode, control scheme and so on. The highway tunnel lighting is widely used in high pressure sodium lamp, high pressure mercury lamp and halogen lamps and so on traditional lamp light efficiency is low, slow start, large energy consumption, flash, is not conducive to intelligent control and mercury pollution.

      LED lighting is a new type of lighting source, which has the advantages of low energy consumption, good light directivity, long life, fast response, no mercury pollution, etc.. LED tunnel lamp compared to traditional sodium lamp lighting energy saving ratio can reach 45% ~ 50%, if the count associated with energy-saving, total energy saving ratio can reach 55%.

Comparison of LED tunnel lamp light source and lamp light source

1, light source comparison:

        Compared with the high voltage sodium lamp, at present LED tunnel lamp in the luminous flux, luminous efficiency, higher than the high-pressure sodium lamp; LED street lamp color better, color rendering index than high pressure sodium lamp is much higher. LED tunnel light attenuation is small, reduced to 80% when life reaches 50000 hours, high pressure sodium lamp is 10000 hours.

2, energy saving comparison:

         According to 10 hours a day lighting, commercial electricity 1 yuan / degree calculation, three years down a lamp LED tunnel lamp than a lamp, high-pressure sodium lamp, 1337 yuan.

Popularization of light LED tunnel lamp 98W

(1) low light decay: if in good heat dissipation conditions, led 10000h for depreciation, the former 10000h decay is 3% ~ 10%, before 50000h M. is 30%, far below the ordinary road lighting light source, light emitting more stable.

(2) high color: General LED display color is about 7 0 to 8 0; high pressure sodium lamp 2 0 ~ 35, low pressure sodium lamp is lower, so even traditional light source brightness higher than the LED, but visual effect difference in LED, "not the brightest, but see most clearly.

(3) life: LED life is higher than the general road tunnel lighting source, now generally more than 50000 hours.

The scheme can also be applied to lighting in workshop, workshop, warehouse, highway toll station, gas station, exhibition hall, gymnasium, construction site, mining area and so on.