Convert Picolux to Foot-candles
Convert Picolux (plx) to Foot-candles (fc) instantly and accurately.
Conversion Formula
fc = plx × 9.290304000e-14
About Picolux
The picolux (plx) equals 10⁻¹² lx. A theoretical subunit used only in precision photometric standard traceability. Even the faintest measurable natural illuminance - starlight on a moonless night at ~200 nlx - is 200 billion times brighter. Appears only in SI reference chains for calibration laboratories. 1 plx = 10⁻¹² lx.
About Foot-candles
The foot-candle (fc) equals 1 lm/ft² ≈ 10.764 lx. Standard in North American lighting design: IESNA recommends 30-50 fc for general offices, 50-100 fc for retail displays, 12-16 fc for cinema screens. Still the dominant unit in the US, Canada and some other countries. 1 fc = 1/0.09290304 lx.
Quick Reference Table
| Picolux (plx) | Foot-candles (fc) |
|---|---|
| 1 plx | 9.29 × 10-14 fc |
| 2 plx | 1.858 × 10-13 fc |
| 5 plx | 4.645 × 10-13 fc |
| 10 plx | 9.29 × 10-13 fc |
| 25 plx | 2.323 × 10-12 fc |
| 50 plx | 4.645 × 10-12 fc |
| 100 plx | 9.29 × 10-12 fc |