Every photometric value has a corresponding radiometric value due to their simple relation. A few examples are given here:
| Photometry | Radiometry |
|---|---|
| Luminous Energy | Radiant Energy |
| Luminous flux | Radiant flux |
| Luminous intensity | Radiant intensity |
| Luminous Exitance | Radiant exitance |
| Illuminance | Irradiance / Flux Density |
| Luminance | Radiance |