CSS - light-level

light-level is a CSS media feature that can be used to check the current ambient light level.

Example

This code will likely not work on any devices (device compatablility is low)

CSS

Copy Code

@media (light-level: normal) {
  p { background: url("texture.jpg"); color: #333 }
}
@media (light-level: dim) {
  p { background: #222; color: #ccc }
}
@media (light-level: washed) {
  p { background: white; color: black; font-size: 2em; }
}

Description

light-level is a CSS media feature that can be used to check the current ambient light level.

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	?	?	?	?	?

Feature	Android	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	?	?	?	?	?

Specifications

Specification	Status	Comment
Media Queries Level 4 The definition of 'light-level' in that specification.	Working Draft	Defered to Media Queries Level 5

Value	Meaning
`dim`	The device is used in a dim environment, where excessive contrast and brightness would be distracting or uncomfortable to the reader. For example: night time, or a dimly illuminated indoor environment.
`normal`	The device is used in a environment with a light level in the ideal range for the screen, and which does not necessitate any particular adjustment.
`washed`	The device is used in an exceptionally bright environment, causing the screen to be washed out and difficult to read. For example: bright daylight.

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/css/@media/light-level

CSS NeedsBrowserCompatibility NeedsExample Reference