Lumen per Square Foot Steradian to Lambert Conversion
Convert between Lumen per Square Foot Steradian and Lambert quickly and accurately.
How to Convert Lumen per Square Foot Steradian to Lambert
Conversion Formula
Example
Convert 15 lm/(ft²·sr) to L:
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
Lambert
L
Definition
The Lambert is a non-SI unit of luminance named after Johann Heinrich Lambert, equal to 3183.0988618379 candela per square meter. It is used in some specialized applications and provides an alternative way to express luminance values in certain technical contexts.
History/Origin
Named after the Swiss mathematician and physicist Johann Heinrich Lambert, this unit was developed as part of early photometric systems. It has historical significance in the development of photometry and is still used in some specialized applications and older technical literature.
Current Use
Used in some specialized photometric applications and historical contexts. Occasionally found in older technical specifications and certain branches of lighting science where traditional units are still preferred or required for compatibility with existing systems.
Multiplier
3183.099
Offset
0
Lumen per Square Foot Steradian to Lambert Conversion Table
| Lumen per Square Foot Steradian [lm/(ft²·sr)] | Lambert [L] |
|---|---|
| 1 lm/(ft²·sr) | 0.003382 L |
| 10 lm/(ft²·sr) | 0.033816 L |
| 25 lm/(ft²·sr) | 0.08454 L |
| 50 lm/(ft²·sr) | 0.169079 L |
| 100 lm/(ft²·sr) | 0.338158 L |
| 0 lm/(ft²·sr) | 0E+0 L |
| -10 lm/(ft²·sr) | -0.033816 L |
| -40 lm/(ft²·sr) | -0.135263 L |
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