Advantages  

1, its own characteristics – light unidirectional, no light diffuse, to ensure the efficiency of lighting.

2. LED street lamp has a unique secondary optical design, which irradiates the light of LED street lamp to the required lighting area, further improving the lighting efficiency, so as to achieve the purpose of energy saving.

3, LED has reached 110-130lm/W, and there is a lot of space for development, the theoretical value of 360lm/W.  The luminous efficiency of high-pressure sodium lamp is increased with the increase of power, therefore, the overall light efficiency of LED street lamp is stronger than the high-pressure sodium lamp;  (This overall light efficiency is theoretical, the actual 250W high pressure sodium lamp light efficiency is higher than LED lamp).

4, LED street light color is much higher than high pressure sodium lamp, high pressure sodium lamp color index is only about 23, and LED street light color index is more than 75, from the perspective of visual psychology, to the same brightness, LED street light illuminance can be reduced by more than 20% than the average high pressure sodium lamp.

5, light failure is small, light failure of less than 3% a year, 10 years of use still meet the requirements of the road, and high pressure sodium light failure, a year or so has dropped more than 30%, therefore, LED street light in the use of power design can be lower than the high pressure sodium lamp.

6, LED street lamp has automatic control energy-saving device, can meet the requirements of different periods of lighting under the maximum possible reduction of power, save energy.  It can realize computer dimming, time control, light control, temperature control, automatic inspection and other humanized functions.

7, long life: can use more than 50,000 hours, provide three years of quality assurance.  The disadvantage is that the life of the power supply is not guaranteed.

8, high light efficiency: the use of more than 100LM chip, compared with the traditional high pressure sodium lamp can save more than 75% energy.

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9, easy installation: no need to add buried cable without rectifier, directly installed on the lamp pole connected or the light source nested in the original lamp shell.

10, excellent heat dissipation control: summer temperature control in 45 degrees below, and the use of passive heat dissipation, summer heat dissipation guarantee is insufficient.

11, reliable quality: all the circuit power supply using high-quality components, each LED has a separate overcurrent protection, no need to worry about damage.

12, light color uniformity: no lens, not to improve brightness and sacrifice uniform light color, so as to ensure no aperture light color uniformity.

13, LED does not contain harmful metal mercury, will not cause harm to the environment when scrapped.

Combined with the above principles, the energy saving effect is remarkable, which can save more than 60% electricity instead of high pressure sodium lamp.

Low maintenance cost: Compared with traditional street lamps, The maintenance cost of LED street lamps is very low. After comparison, the investment cost can be recovered in less than 6 years.

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Disadvantages  

1. Low power of single LED.  In order to obtain high power, multiple parallel connections are required.

2, low color rendering.  The color displayed under LED irradiation is not as true as incandescent lamp, which is a technical problem based on the analysis of spectral distribution.

3. Light spot.  The “yellow circle” problem is easy to be caused by the defect of white LED manufacturing process and the matching error between white LED and reflection cup or lens.

4, LED irradiation uniformity problem.  If the secondary optical design is not carried out, the irradiation of LED is more concentrated, so it is necessary to carry out the secondary optical design, so that the light intensity distribution map  bat shaped.

5, LED light decay problem.  Compared with low-power LED, high-power LED street lamps have much better light decay.  But low-power leds emit very little heat.  However, there is no way to solve the problem of high power LED heat dissipation, and the brightness will be significantly reduced after heating, so the power can not be large.  The largest Spark LED lamp on the market is 360W.

Any questions and requirements,pls contact us,FUJIAN CAS-CERAMIC OPTOELECTRONICS TECHNOLOGY CO.,LTD.

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