close up of light bulb filament
CC BY-NC-ND by https://www.flickr.com/photos/130697617@N02/23973136022/in/photolist-CwqA8q-f9g9Pk-bjDabU-4YHuej-Sq7n2D-9xKDRM-btJjeM-jrJuH7-bCZMkr-frK9j8-c6wkwy-nhL4g2-9mD675-W15B5z-5GP5DR-9HaTFz-34AsmH-dcEcLS-9XZRpS-qgQPmw-cBUetG-5y24qd-HXueX9-8LvaWR-99qp2z-8DBTtF-23q6yrR-95LjrA-8qqcnz-TbMkDJ-NB3kve-HUQQWo-8jnwBx-fq4dsB-5SGM9x-8gy1Wr-RHMvpA-RHBJcc-7N8ksG-oGjs9H-vCJPA2-6BX4Yh-8U68MP-kqQqVK-9xKEFX-nzfbFr-cmFevs-9yvUvB-VrEawL-5v6vgw