Symbol 5552 from IEC 60417 - Title/Meaning: Colour temperature, natural light Function/description: To identify the control or the indicator for correlated colour temperature of natural light outdoors.
Additional information: 
This symbol may be used in conjunction with symbols 5553, 5954, 5955 and 5956
Published in: Supplement M, 1994;2002-10-07;3C/1100/FDIS
Own work using: iso.org/obp/graphics/grs/8e4eb421-cf7f-45b0-a448-236389fa7244 200.png
Vectorization:  Mrmw