Double edged sword - less annoying during the day but now they’re harder to see at night.
Black suffers from this somewhat, but less since backgrounds on the road are rarely black until the hour when headlights become essential. Muted grays are a handicap all day long in any form of suboptimal weather.
In my case, I frequently bump the light knob with my knee as I’m entering or exiting.
Something I think hinders visibility is also that cars are often amongst dozens of other lights, especially at intersections where it matters most.
But yes, I suspect if you were to redo that study in a country where people always have the lights on (perhaps due to local law if nothing else), you'd see the biggest difference in poor lightning conditions.
There is no angle in which you cannot see the headlights of a vehicle.
If the vehicle is parked, there is no angle you should be using that wouldn't illuminate the vehicle.
driving without your lights on after dark is illegal and black colored vehicles have existed for years without these problems.
https://ledlightinginfo.com/led-headlights-in-reflector-hous...
> “To put it simply, yes. LEDs can be used in reflector headlights BUT (and it’s a big but) if you’re upgrading the bulb, you also need to upgrade the reflector bowl. Failure to do so can blind or dazzle other people. You see, no two reflectors are the same. Each reflector headlight design is meticulously crafted based on the precise specifications of the halogen bulb it intends to use. This ensures there’s a good throw and spread of light.
Replacing a halogen bulb with an LED, therefore, throws the reflector off balance. Even minute changes will alter where the light hits the reflector and gets projected out to. Essentially, the light will end up in places it was not intended to. This is exacerbated by the fact that LEDs are a directional light source, whereas halogens are omnidirectional. Unlike halogens, an LED will not illuminate the reflector surface evenly. This has two consequences:
Firstly, by shining light only at the reflector’s sides, there’s likely to be blank, hollow, or hot spots in the light beam.
Secondly, by failing to illuminate the upper portion of the reflector, the headlight will have reduced distance projection. Instead, the light will scatter above the cut-off point and blind other drivers.“