PNG SVG PSD EPS MORE
shapes
Flat
Polygonal
Bolts, shapes, shape
Black
512x512
Cameras and Camcorders Straight
Multimedia Option, light, shapes
Vaadin icons
electricity, shapes, Electric
DarkSlateGray
Web data analytics
shapes, thunder, lightning
Ultimate Glyphicons
Crossed, lightning, Photo Cameras
light, Photo Cameras, Lights
Coolicons
Cool Icons, Bolt, Bolts
Ecologicons
shapes, thunder, electricity
iOS7 Set Filled 2
lightning, light, shapes
Shields
lightning, Bolt, thunderbolt
Energy
lightning, Bolt, Electric