system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is glow-in-the-dark paint not used for things like fire hydrants or road striping?
gpt
Reflective paint is plenty bright (probably brighter even) when headlights are used, and it's *far* more durable. The Netherlands recently tested glow in the dark road markings. It was faded within about a month. So you get very little to no real world benefit on roads where headlights are used, and currently you have a huge downside with it's longevity.