"Brightness levels" refers to the varying degrees of light or illumination. It describes the different levels of brightness that can be adjusted or measured, such as how bright or dim a light or screen appears. Full definition
But getting the right neutral can be tricky, depending on your furnishings and carpets, as well as the size and brightness level of the rooms. (moneysense.ca)
Outdoor visibility should not be an issue at high brightness levels. (indianexpress.com)
You can set different display brightness levels on your laptop or tablet based on whether or not you're plugged into an outlet or not. (howtogeek.com)