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Street lamp is closely related to our life, is the guarantee of our travel safety. The choice for street lamps, in addition to we look at its service life, more important is to look at its luminous efficiency. LED street light to promote the development of, have to let it compared with high pressure sodium lamp as light source of lamps, which one street lamp luminous efficiency will be better? For now, LED street lamp luminous efficiency is not high pressure sodium lamp, LED in the 65 - 75 lumens per watt, high pressure sodium lamp to 125 lumens per watt. However, high pressure sodium lamp spectrum is more focused on yellow, it is only 2000 - color temperature is low 2500 ok, it is light to launch around, a large portion of the light cannot reach the road. , by contrast, the LED color temperature is higher, in 2500 - More than 4000, high color rendering index, so the LED street light irradiation on the road and bright. In general, the LED street light the actual is much higher than high pressure sodium lamp, luminous efficiency is 100 w LED street lamp can replace a 250 w high pressure sodium lamp, LED street lamp can even energy saving 2. 5 times, no matter from the point of view, the LED street lamp adopts is a good choice. This information is provided by lighting and source from http://www. jhzm88. com