Convert Phots to Megalux
Convert Phots (ph) to Megalux (Mlx) instantly and accurately.
Conversion Formula
Mlx = ph × 0.01
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 Wholly superseded by lux and kilolux in modern standards. 1 ph = 10⁴ lx.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 Megalux
The megalux (Mlx) equals 10⁶ lx. Reached only by extreme short-range sources: a short-arc xenon lamp at 5 cm produces ~1-10 Mlx; pulsed photographic strobes at close range several Mlx. The full solar disc on Earth's surface gives ~100 klx - far below 1 Mlx. 1 Mlx = 10⁶ lx.
Quick Reference Table
| Phots (ph) | Megalux (Mlx) |
|---|---|
| 1 ph | 0.01 Mlx |
| 2 ph | 0.02 Mlx |
| 5 ph | 0.05 Mlx |
| 10 ph | 0.1 Mlx |
| 25 ph | 0.25 Mlx |
| 50 ph | 0.5 Mlx |
| 100 ph | 1 Mlx |