What does candela per square foot measure?

It measures the luminous intensity per unit area, indicating the apparent brightness of a surface expressed per square foot using imperial units.

Why convert candela/square foot to blondel?

Conversion helps compare or analyze luminance from modern imperial units with historical brightness data recorded in the obsolete blondel unit.

Is the blondel still used today?

No, blondel is largely obsolete; modern applications use candela per square meter, making blondel relevant mainly for historical or archival purposes.

How to Convert from Candela/square foot to Blondel

Learn how to convert luminance values from candela per square foot to the historical unit blondel with clear steps, examples, and important considerations.

Candela/square foot

Blondel

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Candela/square foot to Blondel Conversion Table

Candela/square foot	Blondel

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.

Candela/square foot to Blondel Conversion Table
Candela/square foot	Blondel

Explore More Luminance Units Converter

What Is This Tool?

This converter helps transform luminance measurements expressed in candela per square foot, a non-SI imperial unit, into blondel, an obsolete unit formerly used in early photometry. It facilitates comparisons between modern and historic brightness data for various applications.

How to Use This Tool?

Enter the luminance value in candela per square foot
Select the source unit as candela/square foot and target unit as blondel
Click convert to see the corresponding blondel value
Refer to the examples provided to verify results
Use converted values to compare or analyze brightness across different eras

Key Features

Converts luminance from candela per square foot to blondel seamlessly
Includes conversion formula directly linking the two units
Offers practical examples to illustrate conversion results
Supports understanding of legacy photometric data
Browser-based and easy to operate without special software

Examples

Convert 2 candela/square foot to blondel resulting in approximately 67.63 blondel
Change 0.5 candela/square foot to blondel which equals about 16.91 blondel
Apply the formula: multiply candela/square foot value by 33.815821889 to get blondel

Common Use Cases

Measuring display and monitor brightness in imperial unit contexts
Calibrating projection screen luminance for cinema and theater
Analyzing historical photometry and early 20th-century lighting reports
Converting legacy brightness data into a modern comparative framework
Studying vintage lighting standards in restoration and research

Tips & Best Practices

Use the conversion mainly when working with historical or archival luminance data
Cross-reference converted values with known standards for accuracy
Avoid using blondel in modern applications to prevent confusion
Ensure units are clearly indicated when sharing converted values
Consult historical photometry sources when interpreting blondel measurements

Limitations

Blondel is obsolete and seldom used in current practice
Non-SI nature of both units may limit precision and clarity
Conversion suits specialized historical or comparative applications only
Modern luminance measurement primarily uses candela per square meter
Relying on blondel may lead to misunderstandings in contemporary settings

Frequently Asked Questions

What does candela per square foot measure?: It measures the luminous intensity per unit area, indicating the apparent brightness of a surface expressed per square foot using imperial units.
Why convert candela/square foot to blondel?: Conversion helps compare or analyze luminance from modern imperial units with historical brightness data recorded in the obsolete blondel unit.
Is the blondel still used today?: No, blondel is largely obsolete; modern applications use candela per square meter, making blondel relevant mainly for historical or archival purposes.

Key Terminology

Candela per square foot: A non-SI unit of luminance that expresses luminous intensity per unit area, commonly used in contexts measuring area in square feet.
Blondel: An outdated photometric unit of luminance named after André Blondel, once used before the adoption of the SI unit candela per square meter.
Luminance: A measure of luminous intensity emitted or reflected by a surface per unit area, indicating its apparent brightness.

Quick Knowledge Check

What is the main purpose of converting candela/square foot to blondel?

To calculate modern SI luminance values

To interpret or compare historic luminance measurements

To replace candela per square meter in lighting design

Which unit is considered obsolete in this conversion?

Candela per square foot

Blondel

Candela per square meter

What is the conversion factor from candela/square foot to blondel?

10.76391

33.815821889

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