Candela Steradian per Square Meter to Foot-Candle Conversion
Convert between Candela Steradian per Square Meter and Foot-Candle quickly and accurately.
How to Convert Candela Steradian per Square Meter to Foot-Candle
Conversion Formula
Example
Convert 15 cd·sr/m² to ft*c, fc:
Unit Information
Learn about the illumination units you're converting between
Candela Steradian per Square Meter
cd·sr/m²
Definition
The Candela Steradian per Square Meter is a unit of illuminance that is dimensionally equivalent to the lux. It represents the luminous intensity per unit solid angle per unit area, providing an alternative way to express illuminance in terms of fundamental photometric quantities.
History/Origin
Derived from the fundamental definitions of luminous intensity and solid angle in the SI system. It provides a direct relationship between illuminance and the basic photometric quantities, emphasizing the geometric aspects of light measurement.
Current Use
Used in theoretical photometry and in calculations where the relationship between luminous intensity, solid angle, and area is emphasized. It provides a fundamental understanding of illuminance in terms of basic photometric principles.
Multiplier
1
Offset
0
Foot-Candle
ft*c, fc
Definition
The Foot-Candle is an imperial unit of illuminance, representing the illuminance produced by a standard candle at a distance of one foot. It is equivalent to approximately 10.76 lux and is commonly used in countries that employ the imperial system for lighting measurements.
History/Origin
Developed in the United States and other countries using imperial units as a practical measure of illumination. It was based on the light output of a standard candle at a distance of one foot, providing an intuitive reference for lighting levels in everyday applications.
Current Use
Still widely used in the United States for architectural lighting, workplace safety standards, and general lighting applications. It provides a familiar unit for lighting professionals and is commonly referenced in building codes and lighting specifications.
Multiplier
10.764
Offset
0
Candela Steradian per Square Meter to Foot-Candle Conversion Table
| Candela Steradian per Square Meter [cd·sr/m²] | Foot-Candle [ft*c, fc] |
|---|---|
| 1 cd·sr/m² | 0.092903 ft*c, fc |
| 10 cd·sr/m² | 0.92903 ft*c, fc |
| 25 cd·sr/m² | 2.322576 ft*c, fc |
| 50 cd·sr/m² | 4.645152 ft*c, fc |
| 100 cd·sr/m² | 9.290304 ft*c, fc |
| 0 cd·sr/m² | 0E+0 ft*c, fc |
| -10 cd·sr/m² | -0.92903 ft*c, fc |
| -40 cd·sr/m² | -3.716122 ft*c, fc |
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