Convert Microlux to Phots
Convert Microlux (µlx) to Phots (ph) instantly and accurately.
Conversion Formula
ph = µlx × 1.000000000e-10
About Microlux
The microlux (µlx) equals 10⁻⁶ lx. Natural night illuminance: a moonless overcast sky ~100 µlx; scattered starlight ~200-300 µlx; crescent moon ~10-50 µlx. Used in night-vision equipment sensitivity specifications and observatory site-quality assessments. 1 µlx = 10⁻⁶ 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 Wholly superseded by lux and kilolux in modern standards. 1 ph = 10⁴ lx.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
| Microlux (µlx) | Phots (ph) |
|---|---|
| 1 µlx | 1 × 10-10 ph |
| 2 µlx | 2 × 10-10 ph |
| 5 µlx | 5 × 10-10 ph |
| 10 µlx | 1 × 10-9 ph |
| 25 µlx | 2.5 × 10-9 ph |
| 50 µlx | 5 × 10-9 ph |
| 100 µlx | 1 × 10-8 ph |