Convert Watts (at 555 nm) to Nanolumens
Convert Watts (at 555 nm) (W₅₅₅) to Nanolumens (nlm) instantly and accurately.
Conversion Formula
nlm = W₅₅₅ × 683000000000
About Watts (at 555 nm)
The watt at 555 nm equals 683 lm exactly, by the 2019 SI definition fixing the luminous efficacy constant K_cd = 683 lm/W at 540 THz (≈ 555 nm, the peak of the photopic eye-sensitivity curve V(λ)). Used in LED optical design and photonics research to convert between radiometric power and photometric flux at peak eye sensitivity. 1 W₅₅₅ = 683 lm.
About Nanolumens
The nanolumen (nlm) equals 10⁻⁹ lm. The scale of single-cell bioluminescence: an individual bioluminescent bacterium emits roughly 1-100 nlm; a luciferin-luciferase reaction in a single cell reaches the low-nanolumen range. Also the range for fiber-optic evanescent-wave sensors and fluorescence microscopy background levels. 1 nlm = 10⁻⁹ lm.
Quick Reference Table
| Watts (at 555 nm) (W₅₅₅) | Nanolumens (nlm) |
|---|---|
| 1 W₅₅₅ | 6.83 × 1011 nlm |
| 2 W₅₅₅ | 1.366 × 1012 nlm |
| 5 W₅₅₅ | 3.415 × 1012 nlm |
| 10 W₅₅₅ | 6.83 × 1012 nlm |
| 25 W₅₅₅ | 1.708 × 1013 nlm |
| 50 W₅₅₅ | 3.415 × 1013 nlm |
| 100 W₅₅₅ | 6.83 × 1013 nlm |