This is a picture to represent "concept". This icon is made by starting with a square. Inside the square are two double sided arrows. One on the left hand side and one at the bottom. There is a light bulb in the image on the top right hand side boxed in by the arrows.
This is a Concept icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,700 icons, all in the same style and quality.