I’ve noticed that newer green lights on traffic signals are colored an annoyingly grassy-bright shade of green. They look as if they’re made up of a number of little light-cells clustered together. The older green lights have a kind of cool, minty hue, and are somewhat eye-like in being (I think) a central light with a reflective backing and tinted lens. Although their surfaces are mottled, kind of like a football, they’re also curved-looking, organic. The new ones look harsh, overbright.
If any signal needs to be brighter, it’s red. People don’t have problems seeing green lights!