The tendency of Chinese manufacturers of bicycle lights and flashlights to claim an artificially high light output. This has necessitated the creation of a new measurement unit, the chilumen or "Chinese Lumen," which has a variable conversion factor to actual lumens.
"I just bought a 10,000 lumen flashlight for $7.99 including shipping from Shenzhen China."
"You're a victim of lumenflation. That flashlight is 10,000 chilumens, not 10,000 lumens."
A measurement unit of light invented by Chinese manufacturers of bicycle lights and flashlights. Also known as "Chinese lumens." One chilumen is usually equal to about 1/2 to 2/3 of a regular lumen. If a product's luminosity is advertised with the disclaimer of "manufacturer rated" then the lumen rating is actually in chilumens.
"I just bought a 5000 lumen light for my bike."
"Man, no way is that light 5000 lumens, it's 5000 chilumens."
German bicycle lighting standard written by non-cyclists designed to force cyclists to subject themselves to increased danger by requiring the use of sub-optimal bicycle lighting systems.
"Dude, your lights suck, no one can see you coming and you just ran into a low hanging tree branch."
"Sorry, I have decided to comply with the StVZO standard which is much more important than seeing or being seen."
"Dude, dump the StVZO lights and buy a good light."
"Never, the German way is the only way."