Along with the continuous energy consumption, it increase the scarcity of resources, and the greenhouse effect is also increasing significantly harm to humans, the pollution on the earth are getting more and more serious, so international demands more on energy saving, today's energy conservation is one of the most important task for every country. In China, the outdoor street lighting represents about 30% of total illumination electricity consumption, if replace the current street lamps to more energy saving products, we can save a lot of energy. LED streetlight as an important and energy saving LED outdoor application, it have many advantages:
1, High-power LED street lamp with long lifespan.
This is the issue we are most concerned about, as many domestic and foreign experts describe optimistically as 5-10 million hours, actually, the lifespan of high-power LED street lamp depends on the following points:
(1) The quality of LED chip, values of light attenuation.
(2) LED package quality, Consistency and reliability.
(3) LED is cold light source, but the LED semiconductor itself generates heat, so good heat dissipation is the condition for LED lighting.
(4) The lifespan of power supply and constant current drive.
2, High energy-saving efficiency.
Lighting project is a systemic, it convert energy into light, whether for illumination or mood lighting, through the light projector, then achieve a location with certain degree of illumination, uniformity and color rendering, several illuminated locations form a complete lighting project, so the efficiency can not be simply compared by power consumption, it's need an integrated and comprehensive analysis.
3, The differences between conventional lighting and LED lighting.
lighting is a combination of light source, power supply, lamp and other accessories. Conventional street lighting mainly composed by the lamp housing, light source cavity, electrical rooms etc.. Besides the sufficient space, the sealing installation of carbon shell and foam silicone rubber are also good for cooling, this ensure the working condition for lights. The protection grade for light source cavity is IP65, electric room is IP45, so the conventional street lighting can be molded into any shape as long as ensure this IP.
And the long lifespan LED street light with advantages of distribute light easily, variable color temperature, high color rendering index, low-voltage and current, have the potential development for high efficient energy-saving.
LED have many benefits in street light:
(1) LED as a light source, with reasonable design, can directly solve the quadratic obtain light and optical loss issues which the traditional spherical lights must rely on the light emitting.
(2) Light uniformity are controllable, in theory, the light can be done completely uniform in the target area, which can avoid the traditional light with phenomenon of "just bright under lamp".
(3) Wide color temperature range, it's also an important way to improve efficiency and reduce costs when apply on different occasions.
(4) Have considerable space for technology improvement.
4, LED streetlight with reasonable optical light.
LED street lamp is different from the traditional one, it has the features of point light source, high brightness, narrow-beam output and so on. The first thing need to be considered for LED street light is to fully utilize the limited flux on the effective area, the request for street light is lighting effect on the road, beyond the road is not a valid range. Therefore, control the light distribution effectively, make the light spread along the road as rectangular, at the same time, consider about the glare problem are the new demands for LED lighting designers.
5, The main technical performance comparison between the LED street light and conventional road light:
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Description
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LED street light
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Traditional street light
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Methods
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Electric network
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Electric network
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Light source
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LED
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High Pressure Sodium Lamp
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|
Color Temperature
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3000 – 8000K
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2700 – 5000K
|
|
Lifespan
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50,000 hours
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3,000 hours
|
|
Power
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144W (energy saving>60%)
|
400W
|
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Actual power consumption
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160W
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500W
|
|
Illumination uniformity
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>0.35, Good
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>0.40, Excellent
|
|
Illuminated area
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Radius>15M, Good
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Radius>15M, Excellent
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Glare control
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maximum light intensity<65 degree, Excellent
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maximum light intensity<65 degree, Good
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Penetrating
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Good fog penetrating ability
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Bad fog penetrating ability
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Ballast
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No ballast
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Need ballast
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Environmental
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Flicker-free, cold light source
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Heating, result yellow shell
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Fireproof rating
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90V-0
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90V-0
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6, energy-saving outcome (by 12 hours per day):
Annual power savings = 365 x 12 x (0.5-0.16) = 1489.2
Annual electricity fee savings = 1489.2 x 0.8 = 1191.36 RMB
After transformation of LED road light, each light can save electricity fee 1191.36 RMB per year. If the whole road lights replaced by LED, it would result in saving a lot of power annually, from the point view of economic, it save a lot of money.
Anyone who want to reproduce this article in other place, MUST add our link: www.ledke.com
Annual power savings = 365 x 12 x (0.5-0.16) = 1489.2
Annual electricity fee savings = 1489.2 x 0.8 = 1191.36 RMB
After transformation of LED road light, each light can save electricity fee 1191.36 RMB per year. If the whole road lights replaced by LED, it would result in saving a lot of power annually, from the point view of economic, it save a lot of money.
Anyone who want to reproduce this article in other place, MUST add our link: www.ledke.com
