This icon is a remake of the light bulb described in Ryan Henningsen's post "How to Create a Vector Light Bulb Icon with Inkscape". "vector.tutsplus.com/tutorials/illustration/how-to-create-a-vector-light-bulb-icon-with-inkscape/"
This is a completely free image Light Bulb that you can download, post, and use for any purpose.
Image License: CC0 No Rights Reserved
You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission, and at no cost. This image is completely free.