Originally Posted by wkjoyce
I noticed some newer SUVS come with RED turn signals in the side mirrors, yet most other cars with OEM turn signals in the side mirror come with amber.
Yes, I realize the standard is red for brakes and amber for turn signals, but which color is scientifically more visible during the day? The application is the LED turn signals shapped like '>'. I am concerned they are small to begin with and will be naturally harder to see.
Good question. Scientifically, it's probably orange. Had I paid attention to the wavelengths and light portion of physics, I could tell you why. But I didn't.
I know BMW uses red dash lights because they're scientifically proven to be easiest on the driver's eyes at night...that has nothing to do with this, but it's somewhat relevant.
Those LED turn signs on the mirrors aren't even required by law though if they have a reflector on the front and rear corners, so it's more of an extra safety/styling thing.
Hey another random fact...in Europe, it's illegal to have red turn signals, only amber. So maybe amber is scientifically more visible.