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Mixed
Glyph
Bold Blue Glyphs (Free Samples)
Moon, night, Dark
LightSkyBlue
512x512
Signs & symbols
Bold Purple (Free Samples)
Flashlight, Flash, brightness
MediumOrchid
UI
Google Material Design icons
brightness
Black
2, brightness
3, brightness
auto, brightness
high, brightness
low, brightness
brightness, medium
Network & communications
Material Device
brightness, auto
medium, brightness
Typicons
Adjust, brightness
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Mobile apps
Free Retina Icon Set
brightness, Source, day
60x60
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Business & finance
Devine Icons Part 2
mesure, brightness
128x128
SEO & web
Metro Uinvert Dock
Orange
256x256
Picol Vector
Brighten, brightness
darken, brightness
Retina Display Icons
Silver
64x64