This is a lightbulb icon. It is shaped like a funnel, with a very wide end at the top then it tapers off towards the bottom. At the bottom, there's a very small black part which is the part that attaches into the fixture.
Related to Reflector Bulb 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