LED Products

What is an LED lighting?

Light Emitting Diode

Features of the LED

Features of the LED Lifetime comparison

LED lifetime

Due to its very nature, an LED will not completely cease lighting up, unlike an incandescent lamp which will no longer light up once the filament wears out.
However, over time the LED's light transmission rate will decrease and its light flux will degrade due to the degradation of the LED chip and the resin that seals the chip. Accordingly, the life of an LED is defined as the time it takes for LED luminance to decrease to 50% of initial luminance at an ambient temperature of 25°C; not the time it takes until the LED no longer lights up.

This definition of LED life also applies to LED lights with LED elements mounted.
The LED life time of required brightness is different depends on the customers from what percent of brightness is required compared to the initial. It may be said that it is the "past life"when it is 20% down from the initial brightness for those who think present brightness is just enough.

For the customers satisfied with 50% luminance of the light capacity in the initial stage, luminance decreased to 50% of the initial value may be considered to be still usable since required luminance can be maintained by increasing power supply as the luminance decreases.
Accordingly, we cannot uniformly define the life of light.


Brightness of the LED

Green (555nm) is good most sensitive, the human eyes are opposite the green in applications such as visual inspection.
However, in the image processing, even lighting that looks bright visually, can be dark in the image of the camera. You also need to consider the compatibility of the illumination wavelength and peak sensitivity characteristics with the individual camera.
The image is brighter when illumination wavelength and peak sensitivity of the camera are close.