You seem to be processed fairly robust and are the majority of the light in a relatively tightly bundled beam of light with high range from.
But ...
What is meant by "500lm" in the description, I could not figure out. Lumen there are at least none that the package itself speaks namely 220 lumens which seems to bring the lamp too.
The (in my case) included AC adapter is for American outlets.
But since I anyway have the lamp still in the car and charging there with the supplied adapter to the cigarette lighter, I'm still happy.