The lampshade is a moustache cut into a neat trapezoid: wider at the base, angled sides, ending exactly at the corners of the mouth, with modest, even height. It is the chevron's office-friendly sibling, groomed where the chevron is grown. Its shape gave it the name, and its restraint gives it a place on faces and in workplaces where a bigger moustache would be a topic. Unremarkable by design, dependable for the same reason.
Who does it suit?
Neutral and safe on nearly every face: it adds a touch of maturity without changing any proportion.
How to maintain it
Trim the shape weekly, edge the lip line, done. The most maintenance-free moustache after simply not having one.