![In biology, a lumen (from Latin lumen, meaning 'an opening'; plural lumina) is the inside space of a tubular structure, such as an artery or intestine. - ppt download In biology, a lumen (from Latin lumen, meaning 'an opening'; plural lumina) is the inside space of a tubular structure, such as an artery or intestine. - ppt download](https://slideplayer.com/16137228/95/images/slide_1.jpg)
In biology, a lumen (from Latin lumen, meaning 'an opening'; plural lumina) is the inside space of a tubular structure, such as an artery or intestine. - ppt download
![LUMEN The lumen is a standardized unit of measurement of the total amount of light that is produced by a light source, suc... | Design guidelines, The unit, Basic LUMEN The lumen is a standardized unit of measurement of the total amount of light that is produced by a light source, suc... | Design guidelines, The unit, Basic](https://i.pinimg.com/736x/ca/7f/bb/ca7fbbed7d81d0ecd4271f512ea38683.jpg)
LUMEN The lumen is a standardized unit of measurement of the total amount of light that is produced by a light source, suc... | Design guidelines, The unit, Basic
![Your city is getting smarter: AustinGIS, Sky Packets, and Lumen to revolutionize smart city, connected experiences Your city is getting smarter: AustinGIS, Sky Packets, and Lumen to revolutionize smart city, connected experiences](https://mma.prnewswire.com/media/1275666/Lumen_Logo.jpg)