Light and optics
| Reference | | Name | Description | Note |
| IEC 60878 5012 |  | Lamp; lighting; illumination | To identify switches which control light sources, e.g. room lighting, lamp of a film projector, dial illumination of a device | |
| IEC 60878 5383 |  | Indication of radiation field center by light | To identify controls for indication of the center of the radiation field by light. | |
