Thank Ian and Chuck

that link explains why i dont see yellows here
"Under US Federal Motor Vehicle Safety Standard number 108 and Canadian Motor Vehicle Standards 108 and 108.1, headlamps as originally installed on motor vehicles (and as installed by anyone other than the vehicle owner) must produce white light"

and it also have same thing about yellows as i remember from my optics lessons.. Oh well. Just will have to comply with yet another odd regulation...

As of pattern, Chuck - yeah i understand that portion, but there is serious difference with color as well. Simplest example - check out how white light and how red light affects your vision at night. Wavelength is different - and imprint on the eye's bottom is different as well.