light - 1.2.2-2 main

Light is a useful tool to control display brightness in lightweight
desktops or window managers that do not have bundled applications for
this purpose.
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Most modern laptops have moved away from hardware controlled brightness
and require software control. Light works where other software has
proven to be unreliable, e.g. xbacklight. It can even be used from the
console as it does not rely on X.
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Light has features like setting a minimum brightness value, as well as
saving and restoring the brightness at reboot and startup.