Radiometric → Photometric calculator
Convert radiant flux (W) to luminous flux (lm) at wavelength λ.
Category: Radiometry
Formula: Φv = 683 · V(λ) · Φe
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| Radiant flux | P | W | 1 |
| λ | lam | nm | 555 |
Result with the default inputs
- V(λ): 1
- Luminous flux: 683 lm
Open it with your own values: put each input in the address as a parameter, for example /calculators/radiometric-photometric?P=1. A unit other than the listed one goes in <parameter>_unit.
Read more: Wikipedia: Luminous efficacy