Reliability and Consistency
Reliability and consistency are extremely important characteristics of an LED. Any designer looking to design an LED into a lighting system should consider not only how the LED will perform on hour 1 but also on hour 1k, 10k and 100k.
It is evident that most LED deterioration is due to poor thermal management. Excessive heat at the junction can damage the crystal quality, the bond pads, and even alter the chemistry of the phosphor or encapsulant material thus making it less transparent. As a general rule of thumb, the more efficiently you can drive heat away from an LED, the more consistent and more reliable your lighting system will be.
The P2O LED produces a long operating lifetime and excellent color stability. The following figure is the test results in the WHTOL test (85℃/85%RH). The lumen decay is less than 10% in very rigorous conditions (700mA, 85℃/85%RH) and the color shift is less than 300K in daylight and 50K in warm white.
The following is a comparison between HCC’s products and our competitors’ products. It is clear that the P2 LED has the best lifetime and color stability.
This figure shows the normal illuminance distribution of HCC’s P2O LEDs and normal LEDs.
(Illuminance is measured at a distance of 1 meter at 350mA.)
The illuminance is divided by the lumen output of each LED to show the optical efficiency.
The result shows HCC’s P2O LEDs have a higher efficiency than normal LEDs and proves that the P2O does not sacrifice efficiency for a perfect light pattern.