High power LED lamps have higher power, brighter brightness and higher price. Low-power leds are rated at 20mA, and anything above that is basically high power. General power: 0.25W, 0.5W, 1W, 3W, 5W, 8W, 10W, etc. The main brightness unit is lm (lumen), and the low power brightness unit is generally mcd. These two units don't convert. At present, as a new type of green, environmental protection, energy saving light source, widely used in automobile lamps, flashlights, lamps and other places.
The reason why it is called high power LED lamp is mainly for small power LED lamp. The current standard classification is summarized into three categories:
First, it can be divided into 0.5W, 1W, 3W, 5W, 10W... 100W is calculated according to the total power of the packaged product.
The second type can be divided into large size epoxy resin package, piranha imitation epoxy resin package, aluminum substrate (MCPCB) type package, TO package, power SMD package, MCPCB integrated package, etc.
The third class can be divided into low-light attenuation high-power products and non-low-light attenuation high-power products according to the different degree of light attenuation. Of course, because the parameters of high-power LED lamps are more, there will be different classification standards according to different parameters, so here is not to repeat.
High power LED lamp is still an LED packaging product, is the most important part of general lighting semiconductor lighting. When using high-power LED lights, it is necessary to understand the light intensity distribution, color temperature distribution, thermal resistance and color rendering. It is necessary to master the light intensity distribution of W - class high power LED lamp.
Manufacturers must provide customers with LED devices with various parameters. The uniform color temperature distribution of high power LED lamp will directly affect the lighting effect. The color temperature and color rendering index are interrelated, and the change of color temperature will lead to the change of color rendering index. The thermal resistance of high power LED lamp directly affects the heat dissipation of LED device. Low thermal resistance, better heat dissipation; High thermal resistance means poor heat dissipation, so the increase in device temperature will affect the wavelength shift of light. According to experience, when the temperature rises one degree, the wavelength of light will be shifted by 0.2~0.3nm, which will directly affect the luminous quality of the device. High temperature also directly affects the service life of W class high-power LED energy-saving lamp. Color rendering is an important index of white LED. White leds used for lighting must have a color rendering higher than 80.