light-level

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

Enumerated values

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.

Example

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

@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; }
}

Specifications

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

Browser compatibility

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

 

Document Tags and Contributors

 Contributors to this page: carlosvigil, CKH4, Sebastianz, kscarfone, cvrebert
 Last updated by: carlosvigil,