Compared with how much light pole traditional high pressure sodium lamp, LED street light

Compared with the traditional high pressure sodium lamp, LED street lamp which has the following advantages? ( 1) As a kind of semiconductor devices, in theory, the useful lifespan of LED lights up to 50000 hours, 15000 hours of high-pressure sodium lamp is much higher. ( 2) With high pressure sodium



compared with the traditional high pressure sodium lamp, LED street lamp which has the following advantages?

( 1) As a kind of semiconductor devices, in theory, the useful lifespan of LED lights up to 50000 hours, 15000 hours of high-pressure sodium lamp is much higher.

　( 2) Compared with high pressure sodium lamp, LED lamp color rendering index [ Light source for color is called color rendering of the object, is by reference or reference light source with same color temperature ( Incandescent lamp or light) The comparison of the object color appearance. 】 Can reach more than 80, quite close to natural light, in this light, the eye of recognition can be effectively, thus ensuring road safety.

　( 3) In the street lamp open, high pressure sodium lamp needs a preheating process, the light from dark to bright need a certain amount of time, not only caused the waste of electricity, and affect the effective development of intelligent control. Compared with LED lights at the instant of the open can achieve the best lighting, there is no such thing as an start time, therefore can achieve good intelligent energy-saving control.

　( 4) From the luminescence mechanism, high pressure sodium lamp is the mercury vapor light, disposed in the light source, if not effective treatment, will inevitably cause the corresponding environmental pollution. LED light is solid state lighting' Solid state lighting ( Solid— StateLighting, SSL) Is a new kind of lighting technology, the use of semiconductor chip as a luminescent material, converts electrical energy into light energy directly, it with incandescent tungsten light and energy-saving light glow sanki toner, semiconductor light-emitting diode ( 领导) The electroluminescence, photoelectric conversion efficiency is higher. 】 There is no harmful substances to human body, is a kind of green light source.

　( 5) Analysis from the aspects of the optical system, high pressure sodium lamp belongs to the omni-directional lighting, more than 50% of the light after reflector reflects is needed to illuminate to the ground, in the process of reflection, is bound to be part of the light loss, affect its utilization. LED lamp is one-way light, the light can directly a directional light, so the utilization rate is relatively high.