# Wikipedia Authors - Lumen (unit) (Highlights)  ## Metadata **Review**:: [readwise.io](https://readwise.io/bookreview/29279364) **Source**:: #from/readwise #from/reader **Zettel**:: #zettel/fleeting **Status**:: #x **Authors**:: [[Wikipedia Authors]] **Full Title**:: Lumen (unit) **Category**:: #articles #readwise/articles **Category Icon**:: 📰 **URL**:: [www.wikiwand.com](https://www.wikiwand.com/en/Lumen_(unit)) **Host**:: [[www.wikiwand.com]] **Highlighted**:: [[2023-06-22]] **Created**:: [[2023-06-22]] ## Highlights - How does Lumen differ from other units of light measurement? Lumen is a unit of measurement that quantifies the amount of [visible light](https://www.wikiwand.com/en/Visible_light) emitted by a source. It differs from other units of light measurement, such as [lux](https://www.wikiwand.com/en/Lux) or [candela](https://www.wikiwand.com/en/Candela), in that it takes into account the sensitivity of the human eye to different [wavelengths](https://www.wikiwand.com/en/Wavelength) of light. Lux measures the amount of light falling on a surface per unit area, while candela measures the intensity of light emitted in a particular direction. Lumen is used to measure the total amount of visible light emitted by a source and is therefore more useful for applications where overall brightness is important, such as lighting design or photography. ([View Highlight](https://read.readwise.io/read/01h3g8eqjah7ygrvy6wbxm9sv8)) ^551663337