LED street bulb is an important part of the city lighting. Traditional street lights often use high pressure sodium lamp, high pressure sodium lamp overall polishing efficiency disadvantage of causing a huge waste of energy, therefore, the development of new highly efficient, energy saving, long life, high color rendering index, environmental protection street lights have great significance. With the implementation of the “Ten City, 10000” pilot work, many of the traditional lighting companies have entered the field of led lighting. Industrial restructuring and upgrading the curtain has been opened.
LED street features:
The difference between high-power LED street bulb and conventional high pressure sodium street is that high-power LED street light with low voltage DC power supply, power Gan-based blue LED and yellow phosphor synthesis of highly efficient white light diodes, lighting emitting diodes based on semiconductor PN junction formed with weak electricity will be able to light-emitting and efficient solid-state light source in the forward bias voltage and injection current injected into the P region holes and into the N region of the electronic spread to the active region by radiative recombination the emitted photon energy directly into light energy.
As the light source, LED street bulb has many advantages compared with traditional street light.
1、LED street light itself has a point of light, no light diffusion to ensure that light efficiency.
2、LED street lamp has a unique optical design, LED street light shines on the required lighting area, namely the road, further improve the light efficiency in order to save energy.
3、The efficiency of the LED light source currently has 100lm / W, but there is still much room for development, the theoretical value can reach 250lm / W. The luminous efficiency of high pressure sodium lamp with the power increase the overall light efficiency LED lights than high pressure sodium.
4、The light color of the LED lights are higher than high pressure sodium lamp. color rendering index of high pressure sodium lamp is only 23 or so, while the LED LED street lamp color rendering index can reach 75 above, from the perspective of visual psychology to consider, in order to achieve the same brightness, the LED street bulb degrees average can lower 20% than the high pressure sodium lamp(refer to the UK road lighting standards); Moreover, in the middle of the visual level, the human eye than the low color temperature environment in the high color temperature environment is more easily identified to avoid the occurrence of certain dangerous state.