Lambert to Lumen per Square Foot Steradian Conversion

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

From Lambert

To Lumen per Square Foot Steradian

lm/(ft²·sr)

How to Convert Lambert to Lumen per Square Foot Steradian

Conversion Formula

1 L = 295.72 lm/(ft²·sr)

1 lm/(ft²·sr) = 0.003 L

Example

Convert 15 L to lm/(ft²·sr):

15 L = 15 × 295.72 lm/(ft²·sr) = 4435.793 lm/(ft²·sr)

Unit Information

Learn about the luminance units you're converting between

Lambert

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

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