|  | Copia LLC | | Consultants in Optical Science |
|  | |
Reference Table: Terminology, Units, and Notation in Radiometry & Photometry
| Notation I |
RADIOMETRY |
PHOTOMETRY |
Notation II |
| F |
Radiant Flux
(W) |
Luminous Flux
(lumen) |
P |
| I |
Radiant Intensity
(W/sr) |
Luminous Intensity
(candela = lumen/sr) |
J |
| E |
Irradiance
(W/m2) |
Illuminance
(lux = lumen/m2) |
H |
| M |
Radiant Emittance
(W/m2) |
Luminous Emittance
(lumen/m2) |
W |
| L |
Radiance
(W/m2sr) |
Luminance
(nit = lumen/m2sr) |
N |
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