PNG ICO ICNS MORE
Web Icons
lightbulb
SandyBrown
48x48
lightbulb, off
Gainsboro
PNG SVG MORE
Signs & symbols
Glyph
Miscellany Web icons
Idea, light, lightbulb
Black
315x512
Mixed
Outline
2 Color Line
bulb, creative, light
349x512
PNG ICO ICNS SVG MORE
Photography & graphic design
Flat
Designer's Tools
light, bulb, lightning
Gold
512x512
Essentials
Idea, electricity, lightbulb
371x512
bitsies!
lamp, Idea, electricity
Glypho - Free
UI
GlyphPack
off, lightbulb
471x512
355x512
Anchor
IndianRed
128x128
Higher Education Icon Set
bulb, brainstorming, lightbulb
SteelBlue
256x256
Education & science
Hand drawn Academic
Energy, light, power
Typicons
Iconic
DarkSlateGray
320x512
PNG MORE
Desktop apps
Plex for Android
96x96
Smooth
Snipicons
All Google icons
y, lightbulb
3D
Momentum Matte icons
32x32
Family & home
Pixel
IconBeast Lite
29x30
Bijou
10x10
Business & finance
Pursuit
LemonChiffon
24x24
48px web iconset
lightbulb, off, Idea