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Signs & symbols
Glyph
Bold Purple (Free Samples)
Flashlight, Flash, brightness
MediumOrchid
512x512
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Miscellany Web icons
Idea, light, lightbulb
Black
315x512
Music & multimedia
Electronic Devices vol 1
table, nightstand, interior
lamp, electrical, table
light, electrical, desk
Electric, Source, Cfl
Electronics & appliances
Electronic Devices vol 2
Extension, plug, switch
Mixed
iconnice vector icon
saturation, light
Glyphicons set Volume 3
fire, Candle, light
Amenities - Solid
Extinguisher, Burn, Flame
Social Messaging & Productivity Mix Icons
light, Idea, bulb
506x512
Business & finance
Business and Finance
Idea, brainstorming, imagination
CadetBlue
Business, light, Idea
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Mobile apps
app types in grey
help, Heart, light
DarkSlateGray
Octicons
bulb, light
UI
Freecns Cumulus
WPZOOM Developer Icon Set
Idea, bulb, light
PNG MORE
Free Retina Icon Set
brightness, Source, day
60x60
48x48 Free Time Icons
Strike, Idea, light
48x48
Picol Vector
off, light
light
Minicons Free
45x45
Mimi Glyphs
Dock, light
16x16
Idea, light