When it comes to lights, people usually think of power, high power consumption, and lights will not turn on. These common sense influences everyone's choice of lamp and the comparison between good and bad. But in fact, we are misleading. The higher the wattage, the better the lighting effect. The cheaper the LED street lamps with the same wattage, the better the effect. This is also conceptual confusion. Wattage and brightness are not always the same. The brightness of light depends on the emission efficiency called the light effect.

The ratio of the total emission flux emitted by the light source to the power consumed by the light source (watts) is called the luminous efficiency of the light source (lm/w (lumens/watts)). Light efficiency is the most important index for measuring LED light source. The higher the emission efficiency, the stronger the ability of LED street lamps to convert electric energy into light. Similarly, the same light energy can save more energy. The greater the emission flux from the power unit of the light source, the higher the efficiency of converting electric energy into light energy. In other words, the light efficiency is high.

LED light source is a very important part of LED street lamp products, and its performance directly affects the overall performance of the product. In addition to power and luminous efficiency, LED light source also has many important performance indicators: emission flux, color temperature, color rendering index and light attenuation.