The main reason to make the HID bulb light color to decay

https://www.foodiesfeed.com/page/1/1200After years of using HID bulbs,
it is very easy to be discovered that the HID bulb begin to have light color fade.
An HID light bulb will
never ever “wear out” in the conventional feeling, just change towards blue and also as a
result give off much less light. That implies after sufficient time, they end up being less-effective for light output
and needs to be replaced.

As a general regulation, a HID light bulb will be essentially ineffective after 6 years of an average of
an hour of use per day. it will certainly still work,
but the lighting output would not be great. And as they
age, light bulbs lighting color change from white to pink or
blue causing them to lose illumination. Despite HID light bulb or LED light bulb, they will be aging when time passes.
That is the reason why the front lights bulb would certainly change
its color.

Headlight bulb goes to be aging, it is the same as the retrofit bi xenon projector on BMW 120i lens.
The reflective surface inside the lens will certainly get aging, which lead to
the surface area of the lens does not clear.
And the surface area is simple to cause moisture to emit less light output.
On the other hand, the glass of concave-convex lens additionally can have moisture.
The outcome is it will certainly block a part
of light so that the light will be dimmer than the standard.

The aging of the HID light bulb (LED light bulb) as well as the projector lens
can affect the light color. If the light output is
dimmer and the illumination is loose, it is reminding you to
upgrade your front lights system. The light output of the factory front lights is dim,
upgrade the front lights system can make it be brighter and have a great vision. When the lens age, it should need to change.

Even BMW, the headlight still will age after using 5-7 years.

So the lens is recommended to change.