LED high-power lamp bead is a kind of LED lamp bead. Compared with low-power LED lamp bead, LED high-power lamp bead has higher power, brighter brightness and higher price. The rated current of low power LED lamp beads is 20mA, and the rated current higher than 20mA can be regarded as high power basically. General power: 0.25w, 0.5w, 1w, 3w, 5w, 8w, 10w, etc. The main luminance unit is lm (lumen), and the luminance unit of small power is generally mcd (millicandela, 1cd=1000 mcd), that is, luminous intensity I.

1cd=1 lm/sr (lumen/solid radian)=1 candle. It is interpreted as the luminous flux emitted by the light source within the solid angle d Ω in the specified direction or the luminous flux transmitted by the light source d Φ， The quotient of the two is the luminous intensity I (in candela, cd). The outer cover can be made of PC tube and can withstand high temperature up to 135 ℃ The LED cover made of PC tube has an internal temperature of 135 degrees and an external temperature of - 45 degrees without cracking. As a new green, environment-friendly and energy-saving light source, it is widely used in automobile lamps, flashlights, lamps and other places. The term "high power LED" is mainly used for low power LED. I summarize three classification standards: the first is based on the power size, which can be divided into 0.5W, 1W, 3W, 5W, 10W... 100W, depending on the total power of packaged products

The second type can be divided into: large-size epoxy resin package, piranha like epoxy resin package, aluminum substrate (MCPCB) type package, TO package, power SMD package, MCPCB integrated package, etc

The third type can be divided into low light attenuation high-power products and non low light attenuation high-power products according to their different light attenuation degrees.

Of course, due to the large number of parameters of high-power LED itself, there will be different classification standards according to different parameters, which will not be described here.

LED high-power lamp beads are still one of the LED packaging products, which is the most important link for semiconductor lighting to enter the field of general lighting.