White leds

[dr pepper]

In the uk cars are now being fitted with white led marker lights.
A white led is as far as I know a blue led that illuminates a phosphor dot which converts it to white light, or a uv led that illuminates a blob of quantum dots that convert it to white light.
While borrowing the wifes sunglasses to drive to work I noticed that cars with led markers showed up green, while incandescent markers wer unaffected through the glasses.
The glasses themseves while dark dont really have any colour tint, except a tiny amount of yellow.
Why is this?

 

[audioguru]

If you mix red, green and blue light in the correct proportions then you get white light.
If you mix red and green light then you get yellow light.
Then if you mix blue and yellow light you also get white by tricking your vision when it thinks the yellow is produced with red and green.

The sunglasses probably block infrared and some red so the white appears green.