First, light source characteristics
LED is called the fourth generation of energy-saving lighting products, environmental protection: no mercury, no ultraviolet light. Energy Saving: High luminous efficiency, the current mass production reaches 160lm/w. Long life: 70% lumen maintenance life of 36,000 hours. Not afraid of vibration, can achieve dimming, intelligent control.
Metal halide lamps belong to high gas discharge lamps. They have a small area of ​​light emitters, light gathering, long irradiation distance and strong penetrating power. However, they have slightly poor light color, slow start-up and high UV content, and are suitable for use in roads, stadiums and other higher places.
Second, explain the technical terms
1, its own power consumption: metal halide lamp due to the use of ballasts, its own high power consumption, high operating current, start a very high starting current, such as 400W gold halide at the moment when the current instantaneous up to 15A, the appliance life The impact is very large, often damaging the air switch facility. At the same time, the ballast itself consumes a large amount of electric energy, causing huge electricity expense to the user and accelerating the aging time of the line; the LED uses a constant current driver, has low power consumption, and has a high power factor to avoid the above problems.
2, color rendering index
It is an important parameter to measure the visual quality of light sources. The color rendering index is high, and it is clear to see things under the lamp and the colors are true. On the contrary, it is not clear to see things under the lamp, the light is blurred, and the objects are greatly distorted. Metal Halide 65, low color rendering index. Working under these light sources can easily cause myopia and visual fatigue.
3, ultraviolet content
Ultraviolet rays are a terrible light that can cause serious damage to the eyes and skin, causing eye disease and skin cancer. The ultraviolet content of traditional light sources is very high, such as metal halide lamp UV content of 34% of the total luminous flux, long-term work under the metal halide lamp will cause considerable damage to the human body, LED does not contain ultraviolet light.
4, repeat the ability to start
After the metal halide lamp is turned off, it needs to wait for a period of 10 minutes before it can be started again. Otherwise, it will be burned and it will cause inconvenience for use.
(1) Glare: It is a kind of light pollution. It is caused by the improper combination of the light source itself or the light source. Working under glare can cause visual fatigue and visual errors. It is also a major cause of myopia.
(2) Strobe: It is a kind of light pollution, which is caused by the periodic change of the AC voltage due to the luminous flux of the point light source. Strobe is the "invisible killer" of the lighting environment, causing myopia and migraine headaches. The LED does not flicker because it rectifies the alternating current into direct current, and the voltage of the direct current does not change periodically.
Third, economic analysis:
The service life of metal halide lamps in factory lighting is a one-year use cycle. The service life of 100W LED explosion-proof light is not less than 3 years. According to this calculation, we can make the following economic analysis:
LED:100WLED Explosion-proof lamp Price:Â¥2500.
The 3-year use fee is:
0.1 degree * 24 hours * 365 days * 3 years + ¥ 2500 = ¥ 5128
Metal Halide Lamp: 250W Metal Halide Lamp Price: ¥800.
The 3-year use fee is:
0.4 degrees * 24 hours * 365 days * 3 years + 1 month/year * 3 years * 800 = ¥ 12912 (250W metal halide lamp actually consumes 400W)
In summary, it can be seen that the use of LED lighting than the use of metal halide lamp to save ¥ 8441 within 3 years, the average annual savings: ¥ 2813, less than one year can see that the investment cost can be recovered, it can be seen that the use of LED lighting than traditional gold Halogen lamps have a great deal of economical and environmental protection.
Comparing the above table, it can be clearly seen that the led lamp has the following advantages over the metal halide lamp: economical and energy saving, low overall cost, long service life, low surface humidity, safety and reliability, and light source environmental protection. LED lights use no flicker, protection of eyesight, can start without waiting.
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