Convert Kilolux to Phots
Convert Kilolux (klx) to Phots (ph) instantly and accurately.
Conversion Formula
ph = klx × 0.1
About Kilolux
The kilolux (klx) equals 1 000 lx. Outdoor daytime scale: overcast sky ~10-20 klx; direct mid-latitude sunshine at noon ~80-100 klx. Required for fine inspection work, surgery, and color-critical print evaluation (ISO 3664: 2 klx). Also the range for plant-growth LED systems at canopy level. 1 klx = 10³ 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 Wholly superseded by lux and kilolux in modern standards. 1 ph = 10⁴ lx.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
| Kilolux (klx) | Phots (ph) |
|---|---|
| 1 klx | 0.1 ph |
| 2 klx | 0.2 ph |
| 5 klx | 0.5 ph |
| 10 klx | 1 ph |
| 25 klx | 2.5 ph |
| 50 klx | 5 ph |
| 100 klx | 10 ph |