LEDs last because they don't cause filaments to blow. The LED does not stop working directly, but it gradually degrades over time. Generally, the LED can be used for more than 50,000 hours, and its luminous intensity will gradually decrease from the nominal value to about 70%. The main reasons for the LED life are the following three components: the light source, the power source and the outer casing.
1. Light source: LED chip quality is an important reason for life, and the design and materials of the chip can affect the life of the LED. LED packaging technology is also an important reason for the LED life, a reliable packaging manufacturer has a great relationship to LED life.
2. Power supply design: Because the discreteness of LED is extremely strong, the voltage drop, wavelength, light color and height are very different. Only the LEDs with the above-mentioned several indicators can be connected in parallel. The high current is small, resulting in uneven color and height, and a long life with a large current. The life of the power supply itself is also an important reason. Generally, the electrolytic capacitor has an 8000-hour life at 105 °C, 15,000 hours at 40-60 °C, and 30,000 hours without electrolytic capacitors.
3. Design of heat dissipation: Heat dissipation is one of the important reasons that affect the life of LED. The illumination of LED requires current drive. Only about 15% of the energy input into LED is effectively converted into light, most (about 85%). Invalid and converted to heat. The ambient temperature is very important, and the ambient temperature can affect the temperature of the LED lamp from 5 to 20 degrees.