Lumen per Square Foot Steradian to Stilb Conversion
Convert between Lumen per Square Foot Steradian and Stilb quickly and accurately.
How to Convert Lumen per Square Foot Steradian to Stilb
Conversion Formula
Example
Convert 15 lm/(ft²·sr) to sb:
Unit Information
Learn about the luminance units you're converting between
Lumen per Square Foot Steradian
lm/(ft²·sr)
Definition
The Lumen per Square Foot Steradian is an imperial unit of luminance that shows the relationship between luminous flux, area, and solid angle using square feet. It is equivalent to 10.7639104167 candela per square meter.
History/Origin
This unit was developed for use in countries employing imperial measurements, providing a way to express luminance in terms of square feet while maintaining the relationship to luminous flux and solid angle. It bridges metric and imperial systems in lighting applications.
Current Use
Used in lighting design and engineering in countries using imperial units, particularly in architectural lighting and display specifications. Common in applications where square footage is the standard area measurement and precise luminance control is required.
Multiplier
10.764
Offset
0
Stilb
sb
Definition
The Stilb is a CGS unit of luminance, equal to 10,000 candela per square meter. It was part of the centimeter-gram-second system and is still used in some specialized applications, particularly in older scientific literature and certain technical contexts.
History/Origin
The stilb was originally defined in the CGS system as a unit of luminance, named after the Greek word for brightness. It was widely used in early photometry and lighting science before the adoption of SI units became standard in most applications.
Current Use
Still used in some specialized scientific applications, particularly in older technical specifications and certain branches of photometry. While largely replaced by SI units, it occasionally appears in historical contexts and specialized measurement systems.
Multiplier
10000
Offset
0
Lumen per Square Foot Steradian to Stilb Conversion Table
| Lumen per Square Foot Steradian [lm/(ft²·sr)] | Stilb [sb] |
|---|---|
| 1 lm/(ft²·sr) | 0.001076 sb |
| 10 lm/(ft²·sr) | 0.010764 sb |
| 25 lm/(ft²·sr) | 0.02691 sb |
| 50 lm/(ft²·sr) | 0.05382 sb |
| 100 lm/(ft²·sr) | 0.107639 sb |
| 0 lm/(ft²·sr) | 0E+0 sb |
| -10 lm/(ft²·sr) | -0.010764 sb |
| -40 lm/(ft²·sr) | -0.043056 sb |
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