Light Meter (RGB & Luminance) is a Chrome add-on developed by loora. It is a free program that falls under the category of Browsers and the subcategory of Add-ons & Tools. This add-on allows users to measure the surrounding light and luminance level using their computer's camera.

With Light Meter (RGB & Luminance), users can easily measure important light metrics, such as the RGB value and luminance level. Upon opening the app for the first time, users may be prompted to grant camera access. Once granted, the add-on will load and be ready to use. If the computer does not have a built-in camera, users will need to attach one before using the add-on.

The interface of Light Meter (RGB & Luminance) displays various information about the captured light on the top toolbar. Users also have the option to adjust the RGB calculation precision using the slider at the bottom. The app can be opened in a separate window, new tab, or toolbar popup, depending on the user's preference.