Convert Watts (at 555 nm) to Gigalumens
Convert Watts (at 555 nm) (W₅₅₅) to Gigalumens (Glm) instantly and accurately.
Conversion Formula
Glm = W₅₅₅ × 6.830000000e-7
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 Gigalumens
The gigalumen (Glm) equals 10⁹ lm. The scale for very large lighting installations and for theoretical comparisons: a large airport apron illuminated to 30 lx over 1 km² would require approximately 30 Glm of total installed luminous flux. The full-disk luminous flux of the Sun is approximately 3.6 × 10²⁸ lm. 1 Glm = 10⁹ lm.
Quick Reference Table
| Watts (at 555 nm) (W₅₅₅) | Gigalumens (Glm) |
|---|---|
| 1 W₅₅₅ | 6.83 × 10-7 Glm |
| 2 W₅₅₅ | 1.366 × 10-6 Glm |
| 5 W₅₅₅ | 3.415 × 10-6 Glm |
| 10 W₅₅₅ | 6.83 × 10-6 Glm |
| 25 W₅₅₅ | 1.708 × 10-5 Glm |
| 50 W₅₅₅ | 3.415 × 10-5 Glm |
| 100 W₅₅₅ | 6.83 × 10-5 Glm |