Although LED lights are still 2 times expensive than high pressure sodium lamps, but the overall power consumption and maintenance costs and other factors, the use of two years after, LED lights and high pressure sodium lamp is almost equal to the total cost. Therefore, in the long term, LED lights will be better than the current cost of using high-pressure sodium lamps. With the falling prices of LED lights, its competitive advantages will be more apparent. But the longer the economic recovery cycle to the development of mass-market LED lights bring some obstacles. However, the choice of good quality LED lights is very important.
1, LED street lights own characteristics – unidirectional light, no light diffusion, to ensure the efficiency of light.
2, LED street lights have a unique optical design, the LED street light shines area lighting required to further improve the light efficiency in order to save energy.
3, LED street light source efficiency reached 110-130lm / W, but there is still much room for development, theoretical value of 250lm / W. The high-pressure sodium lamp luminous efficiency is increased with the increase in power have, therefore, the overall efficiency LED light stronger than high pressure sodium lamps; (this overall light efficiency is theoretical, in fact, more than 250W HPS light efficiency than LED) .
4, LED street light color than high pressure sodium much higher, high pressure sodium lamp color rendering index of only 23, while the LED lights color rendering index of 75 or more, from the visual psychological point of view, to achieve the same brightness, LED lights for illumination average of than high pressure sodium reduced by 20% or more, (see British road lighting standards).
5, light is small, light decline a year less than 3% for 10 years still to road illumination requirements, and high-pressure sodium lights big decline, about a year has fallen more than 30%, therefore, LED lights in the use of power design can be lower than the high-pressure sodium lamps.
6, LED lights with automatic control of energy-saving devices, to achieve different times to meet the lighting requirements in the case of the maximum possible reduction in power and save energy. Spark intelligent LED lights dimming can be achieved by computer, sub-time control, lighting control, temperature control, remote control, automatic inspection and other user-friendly features.
7, LED is a low-voltage devices, drive single LED voltage is safe voltage, the series are single LED power 1 watt, so it is a more secure than using a high voltage power supply, especially for public spaces (such as: street lighting, factories lighting, automotive lighting, commercial lighting, etc.).
8, Each unit LED die only a small volume, it can be prepared into various shapes of devices, and for the environment variable.
9, Long life: more than 50,000 hours can be used to provide three years of quality assurance. Inadequacy is the power of life can not be guaranteed.
10, High luminous efficiency: ≥ 100LM above using chips, as opposed to traditional high pressure sodium lamp energy saving more than 75%.
11, Easy to install: no need rectifiers cable directly to the street light poles connected to or installed in the original light source nested shells.
12, Excellent thermal control: Summer temperature at 45 degrees, and the use of passive cooling in the summer heat inadequate protection.
13, Reliable: the power circuit all high-quality components, each LED has a separate over current protection, without fear of damage.
14, Light color uniform: without lens, not to increase the brightness at the expense of uniform light color, thus ensuring no aperture light color uniform.
15, LED does not contain toxic metals mercury, unlike high pressure sodium or metal halide lamps at end of life damage to the environment.
LED lamps Low maintenance costs: Compared with traditional lamps, LED street light maintenance costs low, by comparison, less than six years to recover the full cost of inputs. led light bulbs。