LED lamp lumen depreciation refers to the light intensity of LED is lower than the original light after a period of illumination, and this lower part is the lumen depreciation of LED. General LED packaging factory is tested in the laboratory under the condition of room temperature (25 ℃), the direct current of 20MA is lit for 1,000 hours to compare the light intensity before and after the lighting
Lighting efficiency definition is a symbol of energy saving characteristics of light source. This is an important index to measure the performance of led light sources. Then what does luminous efficacy of outdoor led lighting systems mean? Written by led outdoor lighting suppliers-HEPETECH
CRI is a very important index to measure led photoelectric parameters. Then what does CRI stand for in lighting? CRI refers to the characteristics of different colors when the light source of different spectra is irradiated on an object of the same color. It is usually measured by Color Render Index or Ra.
LED kelvin temperature refers to the color characteristic displayed by the led lamps. It's expressed in terms of thermodynamic temperature “K” or “kelvin”. When the standard black body is heated and the temperature rises to a certain extent, the color of the black body gradually changes to dark red, light red, orange, white, and blue. At the same time, the thermodynamic temperature of the black bo
Indoor and outdoor led lighting is a very important part of the application of led. It can be divided into indoor outdoor led decorative lighting, indoor functional lighting, and identification and indicative lighting.
In the past decade, LED has become more and more widely used, as shown in the figure. With the advent of ultra bright LED (especially white LED), the use of LED in lighting becomes possible.
Light is a form of energy that can be propagated from one object to another without the need for any other medium. This energy is often referred to as radiation, which means that energy travels in all directions from the energy source along the line (within the same medium).
Outdoor led street lights consist of led street light module, driver power, heat dissipation device, optical system and lamp shell. Compared to the traditional street lamps, led street lamp has many advantages.
As electrical products, led street lamp is surely had to meet the local standard CE certification when exports to the European Union countries. That is to say the street lamp exports to European needs to issue the led street light CE certification, then the goods can enter the EU.
The Differences Between LED and Traditional Light Source Which are Applied to Outdoor LED Street Lights
LED and traditional light source all can be applied to outdoor LED street lights. Then what’s the differences between these two lighting sources?