Related Clues:
- Unit for measuring flow of light
- Electrical energy measurement
- Unit of light-bulb intensity
- Unit for light bulbs
- Measure of brightness
- Photometry unit
- Photometry measure
- Light measurement
- Unit of light flux
- Light unit half finishes beneath chimney
- Energy unit (2 words)
- Equivalent of 3600 joules
- Measure of light's brightness
- Light unit measurement's European norm initially
- Unit of perceived brightness