system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What makes neon colors have that unique glow?
gpt
"Neon" colors use fluorescence dyes that glow under UV light.  So if the object is "neon orange", it both reflects the orange portion of the sunlight hitting it, **and** converts UV light hitting it into additional orange light.  That makes it seem brighter than it should given the current lighting conditions.