is 10.88 KB, has a resolution of 512x512 pixels and was uploaded on November 13, 2018 @ 2:16 pm by user: franner. It is filed under the tags: symbol, luminous efficacy, mercuryvapor lamp, lighting, fluorescent lamp. Click the blue button at the top to freely download: Lightbulb Incandescent Light Bulb Fluorescent Lamp png.