Source of light
- Source of light
- Sun / Daylight 44
- Moonlight 7
- Bioluminescence 1
- Fluorescence / phosphorescence / luminescence radiation 19
- Fossil burnings 1
- Electric arc / carbon arc lamp / Yablochkov candle 2
- Filament lamp / incandescant lamp 37
- Neon and fluorescent tubes, custom made 75
- Neon- and fluorescent tubes, industrially manufactured 49
- Gas discharge lamp 4
- Halogen 25
- LED 80
- OLED 3
- Electroluminescence 2
- Laser 18
- Flash 6
- Ultraviolett / Ultraviolet radiation 10
- Infrared / infrared radiation
- Bildschirm / LCD TFT Monitor 21
- Projection system 131
- Control system 126
- Other 10