What industries use foot-lambert measurements?

Foot-lambert is often used in cinema and home theater calibration, theatrical projection design, and display screening where imperial units are standard.

Does this conversion account for surface properties?

The conversion assumes perfectly diffuse surfaces and uniform luminance, which may not hold true for all real-world applications.

How to Convert from Lumen/sq. meter/steradian to Foot-lambert [fL]

Q: Why convert from lumen/sq. meter/steradian to foot-lambert?

Converting allows users to translate luminance measurements from the metric system to the imperial system, which is useful in industries and regions that commonly specify brightness in foot-lamberts.

Learn how to convert luminance values from lumen per square meter per steradian (lm·m⁻²·sr⁻¹) to foot-lambert (fL), an imperial unit used in display and projection brightness specifications.

Lumen/sq. meter/steradian

Foot-lambert [fL]

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Lumen/sq. meter/steradian to Foot-lambert [fL] Conversion Table

Lumen/sq. meter/steradian	Foot-lambert [fL]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

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Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Lumen/sq. meter/steradian to Foot-lambert [fL] Conversion Table
Lumen/sq. meter/steradian	Foot-lambert [fL]

Explore More Luminance Units Converter

What Is This Tool?

This converter allows you to transform luminance measurements from the SI unit lumen per square meter per steradian into the imperial unit foot-lambert. It helps users switch between measurement systems commonly used in various industries for assessing brightness emitted or reflected from surfaces.

How to Use This Tool?

Enter the luminance value in lumen per square meter per steradian
Select foot-lambert as the target unit
Click convert to see the equivalent foot-lambert value
Use the converted value for your display calibration, lighting design, or measurement needs

Key Features

Converts luminance from lumen/sq. meter/steradian to foot-lambert [fL]
Supports brightness specifications for displays, signage, and projection systems
Provides a browser-based and user-friendly tool for quick unit conversions
Facilitates consistency across metric and imperial luminance units

Examples

5 lumen/sq. meter/steradian converts to approximately 1.4593 foot-lambert [fL]
10 lumen/sq. meter/steradian converts to approximately 2.9186 foot-lambert [fL]

Common Use Cases

Specifying brightness for monitors, smartphones, and TV screens
Calibrating projected-screen brightness in cinemas and home theaters
Designing and testing theater projection and lighting systems
Ensuring brightness standards for signage and road signs
Performing photometric measurements and instrument calibration

Tips & Best Practices

Use the converter to align brightness specifications between metric and imperial units
Apply conversions carefully when calibrating devices to maintain visual consistency
Consider the measurement context since uniform luminance assumptions may vary
Verify results when working in international or multi-standard environments

Limitations

Unit conversion may affect perceived brightness due to differences in measurement systems
Foot-lambert is less widely used internationally compared to candela per square meter
Conversion assumes ideal diffuse surfaces and uniform brightness distribution
Rounding errors can occur when switching between units

Frequently Asked Questions

Why convert from lumen/sq. meter/steradian to foot-lambert?: Converting allows users to translate luminance measurements from the metric system to the imperial system, which is useful in industries and regions that commonly specify brightness in foot-lamberts.
What industries use foot-lambert measurements?: Foot-lambert is often used in cinema and home theater calibration, theatrical projection design, and display screening where imperial units are standard.
Does this conversion account for surface properties?: The conversion assumes perfectly diffuse surfaces and uniform luminance, which may not hold true for all real-world applications.

Key Terminology

Lumen/sq. meter/steradian: A metric unit of luminance measuring luminous intensity per projected area per solid angle, equivalent to the candela per square meter.
Foot-lambert [fL]: An imperial unit of luminance that measures luminous intensity emitted or reflected from a surface per projected area, defined as 1 divided by π candela per square foot.
Luminance: The brightness of a surface in a particular direction, quantifying emitted, reflected, or transmitted luminous intensity per unit area and solid angle.

Quick Knowledge Check

What is the SI equivalent of lumen/sq. meter/steradian?

Candela per square foot

Candela per square meter

Foot-lambert

Which is a common use of foot-lambert?

Lighting design for road signs

Home theater brightness calibration

Specifying smartphone brightness

What assumption is made during conversion between lumen/sq. meter/steradian and foot-lambert?

Perfectly diffuse surfaces and uniform luminance

Identical brightness perception

No need for calibration

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