Convert Phots to Millilux
Convert Phots (ph) to Millilux (mlx) instantly and accurately.
Conversion Formula
mlx = ph × 10000000
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 Wholly superseded by lux and kilolux in modern standards. 1 ph = 10⁴ lx.
About Millilux
The millilux (mlx) equals 10⁻³ lx, also called 1 nox (CIE historical unit). Moonless clear sky: ~1 mlx; quarter moon: ~20-50 mlx; full moon at zenith: ~100-270 mlx. Minimum for dark-adapted outdoor navigation. Emergency exit pathway lighting is typically 1-5 mlx. 1 mlx = 10⁻³ lx = 1 nox.
Quick Reference Table
| Phots (ph) | Millilux (mlx) |
|---|---|
| 1 ph | 10000000 mlx |
| 2 ph | 20000000 mlx |
| 5 ph | 50000000 mlx |
| 10 ph | 100000000 mlx |
| 25 ph | 250000000 mlx |
| 50 ph | 500000000 mlx |
| 100 ph | 1000000000 mlx |