This is a Light Off 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 12,500 icons, all in the same style and quality.
This is a lightbulb indication to show that the light is turned off. It shows a lightbulb, with a large bulbous circle at the top which tapers off onto the bottom, and there's a large X in the middle to indicate the light is off.
Related to Light Off Icon
Related icons are the icons with matching tags, as well as all household icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors