Idea of Idea Icon
It is a light bulb. Inside of it, there is a “Y” sort of drawing to indicate the inner workings of the bulb. It also has the screwing part on the bottom of the bulb.
This Idea icon has Android KitKat style
. If you use the icons for Android apps, we recommend using our latest Material Icons icon pack (please check our sidebar on the right). Otherwise, it's a solid icon pack that looks good in small resolutions, either on the web or in print. It's characterized by thick lines, smooth corners, and is optimized for 24x24 pixels.