Symbol 5321 from IEC 60417 - Title/Meaning: Low-intensity lighting Function/description: To identify a control for low-intensity lighting if a distinction from the symbol 5012 is necessary, for example, dark-room lighting.
Additional information: 
Published in: Supplement G, 1985
Own work using: iso.org/obp/graphics/grs/84d3269f-1f1d-4b05-a1c2-89fc8cf47790 200.png
Vectorization:  Mrmw