[arch-general] Backlight Brightness Indicator in LXDE

[naicam|ne]

I just got my brightness keys working and I'm looking for a pretty 
minimal "brightness indicator" to show me a rough percentage. I am 
explicitly trying to avoid any Gnome or KDE dependencies, and would 
prefer not to use the AUR, if there's a good one in the main repos. I'm 
thinking it might have to come with some power management package, but 
I'm not really sure.

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