Lumen per Square Meter Steradian to Foot-Lambert Conversion

Convert between Lumen per Square Meter Steradian and Foot-Lambert quickly and accurately.

lm/(m²·sr)
fL

How to Convert Lumen per Square Meter Steradian to Foot-Lambert

Conversion Formula

1 lm/(m²·sr) = 0.292 fL
1 fL = 3.426 lm/(m²·sr)

Example

Convert 15 lm/(m²·sr) to fL:

15 lm/(m²·sr) = 15 × 0.292 fL = 4.378 fL

Unit Information

Learn about the luminance units you're converting between

Lumen per Square Meter Steradian

lm/(m²·sr)

Definition

The Lumen per Square Meter Steradian is a unit of luminance that explicitly shows the relationship between luminous flux, area, and solid angle. It is dimensionally equivalent to candela per square meter and provides insight into the geometric aspects of light measurement.

History/Origin

This unit was developed to emphasize the relationship between luminous flux, surface area, and solid angle in luminance measurements. It provides a more detailed understanding of how light is distributed and measured in three-dimensional space.

Current Use

Used in advanced photometry and lighting calculations where the relationship between flux, area, and solid angle is important. Common in research applications and detailed lighting analysis where understanding the geometric aspects of light distribution is crucial.

Multiplier

1

Offset

0

Foot-Lambert

fL

Definition

The Foot-Lambert is an imperial unit of luminance equal to 3.4262590996 candela per square meter. It is commonly used in display technology and lighting applications in countries that employ imperial measurement systems.

History/Origin

This unit was developed as an imperial equivalent to the lambert, using square feet as the area unit. It provides a practical way to measure luminance in contexts where imperial units are standard, particularly in display technology and lighting applications.

Current Use

Widely used in display technology, particularly in the United States, for specifying monitor brightness, television luminance, and other display characteristics. Common in consumer electronics specifications and lighting applications where imperial units are standard.

Multiplier

3.426

Offset

0

Lumen per Square Meter Steradian to Foot-Lambert Conversion Table

Lumen per Square Meter Steradian [lm/(m²·sr)] Foot-Lambert [fL]
1 lm/(m²·sr) 0.291864 fL
10 lm/(m²·sr) 2.918635 fL
25 lm/(m²·sr) 7.296588 fL
50 lm/(m²·sr) 14.593175 fL
100 lm/(m²·sr) 29.186351 fL
0 lm/(m²·sr) 0E+0 fL
-10 lm/(m²·sr) -2.918635 fL
-40 lm/(m²·sr) -11.67454 fL