Luminous Efficacy calculator
Convert radiant power to luminous flux at a given wavelength (photopic).
Category: Radiometry
Formula: Φv = 683 · V(λ) · Φe (lm/W)
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| Wavelength | lam | nm | 555 |
| Radiant power | P | mW | 1 |
Result with the default inputs
- V(λ): 1
- Luminous flux: 0.683 lm
- Efficacy: 683 lm/W
Open it with your own values: put each input in the address as a parameter, for example /calculators/luminous-efficacy?lam=555. A unit other than the listed one goes in <parameter>_unit.
Read more: Wikipedia: Luminous efficacy