What does lumen/square foot/steradian measure?

It measures luminance as luminous flux per unit area per unit solid angle, quantifying brightness from surfaces in U.S. customary units.

When should I convert to lumen/sq. cm/steradian?

Converting to lumen/sq. cm/steradian is useful for characterizing brightness of small or high-intensity light sources and performing precise optical measurements.

Are lumen/square foot/steradian and lumen/sq. cm/steradian equivalent units?

They both measure luminance but are based on different unit systems; lumen/square foot/steradian uses customary units, while lumen/sq. cm/steradian uses metric units.

Convert Lumen/square foot/steradian to Lumen/sq. cm/steradian

Effortlessly convert luminance values from lumen per square foot per steradian to lumen per square centimetre per steradian using our unit converter. Ideal for lighting design, signage, and photometric measurements.

Lumen/square foot/steradian

Lumen/sq. cm/steradian

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Lumen/square foot/steradian to Lumen/sq. cm/steradian Conversion Table

Lumen/square foot/steradian	Lumen/sq. cm/steradian

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

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

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

Lumen/square foot/steradian to Lumen/sq. cm/steradian Conversion Table
Lumen/square foot/steradian	Lumen/sq. cm/steradian

Explore More Luminance Units Converter

What Is This Tool?

This online converter allows you to translate luminance values measured in lumen per square foot per steradian into lumen per square centimetre per steradian. It is designed to support applications in lighting, signage, and optical measurement by converting between customary U.S. units and metric units of luminance.

How to Use This Tool?

Enter the luminance value in lumen per square foot per steradian
Select the desired output unit as lumen per square centimetre per steradian
Click the convert button to see the equivalent value
Apply the conversion result to your lighting or measurement project as needed

Key Features

Converts luminance units from lumen/square foot/steradian to lumen/sq. cm/steradian
Supports precise unit translation for lighting and photometric applications
Useful for architectural lighting, signage brightness, and optical instrumentation
Browser-based and easy to use with simple input and output fields

Examples

10 lumen/square foot/steradian equals 0.01076391 lumen/sq. cm/steradian
100 lumen/square foot/steradian equals 0.1076391 lumen/sq. cm/steradian

Common Use Cases

Measuring brightness of signs and billboards using U.S. customary units
Performing architectural lighting design assessments focused on glare control
Calibrating luminance meters reporting in non-SI customary units
Designing and testing LEDs, micro-displays, and high-brightness light sources
Conducting optical and photometric measurements involving small surface areas

Tips & Best Practices

Ensure consistent measurement angles to maintain accuracy across units
Be mindful of surface uniformity to minimize discrepancies in readings
Use this conversion when small-area or high-intensity luminance precision is required
Cross-check values after conversion for standardization in international contexts

Limitations

Conversion depends on differing area units which require careful attention
Measurement precision and angle can affect the consistency of results
Units come from different measurement systems (customary vs metric), influencing standardization
Surface non-uniformity may lead to discrepancies between converted values

Frequently Asked Questions

What does lumen/square foot/steradian measure?: It measures luminance as luminous flux per unit area per unit solid angle, quantifying brightness from surfaces in U.S. customary units.
When should I convert to lumen/sq. cm/steradian?: Converting to lumen/sq. cm/steradian is useful for characterizing brightness of small or high-intensity light sources and performing precise optical measurements.
Are lumen/square foot/steradian and lumen/sq. cm/steradian equivalent units?: They both measure luminance but are based on different unit systems; lumen/square foot/steradian uses customary units, while lumen/sq. cm/steradian uses metric units.

Key Terminology

Lumen/Square Foot/Steradian: A non-SI unit of luminance indicating luminous flux per square foot area per steradian solid angle; used primarily in U.S. customary measurements.
Lumen/Sq. cm/Steradian: A metric photometric unit describing luminous flux per square centimetre area per steradian solid angle; equivalent to candela per square centimetre.
Luminance: A photometric measure of the luminous intensity emitted or reflected from a surface per unit area in a given direction.

Quick Knowledge Check

What unit system does lumen/square foot/steradian belong to?

Metric system

U.S. customary system

SI system

What is lumen/sq. cm/steradian equivalent to?

Candela per square centimetre

Candela per square foot

Lumen per steradian only

Why is conversion between these units important?

To translate luminance from large customary areas to small metric areas

To change luminous flux to luminous intensity

To convert light wavelength

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