This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Light bulb by Lewis Latimer Museum of Science and Industry Chicago DSC. en Exhibit in the Museum of Science and Industry Chicago Illinois USA Photography was permitted in the museum without restriction own Daderot cczero Light bulbs in the Museum of Science and Industry Chicago Uploaded with Early incandescent light bulbs