Symbol 6196 from IEC 60417 - Title/Meaning: Immediate stop, light source Function/description: To identify the control to immediately stop the non-laser light source output, e.g. in case of an emergency.
Additional information: 
Non-laser light source (LS) equipment is the medical electric (ME) equipment which incorporates one or more sources of optical radiation in the wavelength range 200 nm to 3 000 nm, with the exception of laser radiation, and which is intended to create non-visual photo-biological effects in humans or animals for therapeutic, diagnostic, monitoring, cosmetic / aesthetic or veterinary applications.
See also IEC 60601-2-57.
[IEC 60417-C00294 followed by:2013-04-12: 3C/1859/CD 2013-07-19: 3C/1871/CC 2013-07-19: 3C/1872/CDV 2013-11-01: 3C/1894/RVC]
Own work using: iso.org/obp/graphics/grs/2a45736f-a629-4573-b683-c06b415437a0 200.png
Vectorization:  Mrmw