http://www.as-garten.at/Kugel-Kaktus-Neon-Zimmerpflanzen–1193d1d53123.html

 

They sell a cactus which is said to glow in the dark.

I did some google research, and found out that they have injected particles in the cactus that accumulate the light, and emit it later. So,  it won’t glow the entire night. And, when the cactus grows, the  new tissue/ parts of the plant won’t ‘glow’ because it was not inserted those particles.

Just phosphorescence (from the greek phos/photo -> light; phor(ein) -> carry ), no bioluminescence. And, just for as long as the cactus does not grow significantly. But anyway, 8 € is affordable. I’m gonna buy one 😉

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