Convert Nanolux to Phots
Convert Nanolux (nlx) to Phots (ph) instantly and accurately.
Conversion Formula
ph = nlx × 1.000000000e-13
About Nanolux
The nanolux (nlx) equals 10⁻⁹ lx. Astronomical night-sky scale: the zodiacal band contributes ~10-50 nlx; airglow ~150 nlx; the Milky Way core ~100 nlx. The absolute human eye threshold is around 100 nlx. Used in night-sky quality metrics and photomultiplier tube calibration. 1 nlx = 10⁻⁹ lx.
About Phots
The phot (ph) equals 1 lm/cm² = 10 000 lx. The CGS-photometric unit of illuminance. Pre-SI optics texts express daylight in phots: full tropical sunshine is ~10 ph (100 klx); overcast sky ~0.1-0.2 ph. Wholly superseded by lux and kilolux in modern standards. 1 ph = 10⁴ lx.
Quick Reference Table
| Nanolux (nlx) | Phots (ph) |
|---|---|
| 1 nlx | 1 × 10-13 ph |
| 2 nlx | 2 × 10-13 ph |
| 5 nlx | 5 × 10-13 ph |
| 10 nlx | 1 × 10-12 ph |
| 25 nlx | 2.5 × 10-12 ph |
| 50 nlx | 5 × 10-12 ph |
| 100 nlx | 1 × 10-11 ph |