Symbol 1421B from ISO 7000 - Title/Meaning: Interior compartment illumination; interior (dome) light 
Function/description: To identify the control that operates the interior compartment illumination. To indicate the operational status of the dome light.
Own work using: iso.org/obp/graphics/grs/14d8774b-42d0-440e-b3af-9377167fbd6a 200.png
Vectorization:  Mrmw