Foot-Lambert to Lumen per Square Foot Steradian Conversion

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

From Foot-Lambert

To Lumen per Square Foot Steradian

lm/(ft²·sr)

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

Conversion Formula

1 fL = 0.318 lm/(ft²·sr)

1 lm/(ft²·sr) = 3.142 fL

Example

Convert 15 fL to lm/(ft²·sr):

15 fL = 15 × 0.318 lm/(ft²·sr) = 4.775 lm/(ft²·sr)

Unit Information

Learn about the luminance units you're converting between

Foot-Lambert

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

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