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How to Convert from Bougie Decimal to Lumen/Steradian [lm/sr]
Learn how to convert luminous intensity values from the historical bougie decimal unit to the modern lumen per steradian (lm/sr), equivalent to the SI candela unit, for photometric analysis and lighting applications.
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Bougie decimal to Lumen/steradian [lm/sr] Conversion Table
| Bougie decimal | Lumen/steradian [lm/sr] |
|---|
Custom Unit Conversion Table Generator – Instant Printable Conversion Tables
Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
| Bougie decimal | Lumen/steradian [lm/sr] |
|---|
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What Is This Tool?
This converter transforms luminous intensity measurements from the obsolete bougie decimal unit, once used in 19th- and early 20th-century French lighting standards, to lumen per steradian (lm/sr), a unit identical to the candela used today for directional brightness.
How to Use This Tool?
- Enter the luminous intensity value in bougie decimal.
- Select bougie decimal as the source unit and lumen/steradian [lm/sr] as the target unit.
- Click the convert button to get the equivalent value in lm/sr.
- Use converted results to interpret or compare with modern lighting specifications.
Key Features
- Converts obsolete bougie decimal values to modern lumen/steradian units.
- Facilitates analysis of historical photometric data and archival research.
- Supports lighting industry applications such as LED and headlight intensity comparisons.
- Provides a direct 1 to 1 conversion rate between bougie decimal and lm/sr.
- Browser-based and easy to use for both professionals and educators.
Examples
- 5 bougies decimal converts to 5 lumen/steradian.
- 0.75 bougie decimal equals 0.75 lumen/steradian.
Common Use Cases
- Translating historical luminous intensity measurements for restoration or archival projects.
- Calibrating photometric instruments using historic data converted to modern units.
- Studying the evolution of measurement units in photometry and lighting design.
- Comparing beam intensities of vintage lighting with current technology.
Tips & Best Practices
- Verify the context of historical measurements when converting to modern units.
- Use the converter to facilitate comparisons but consider historical rounding or measurement limits.
- Employ conversions for educational purposes to understand photometric unit history.
- Cross-reference conversions with modern standards when applying to lighting specifications.
Limitations
- Bougie decimal is no longer officially used and conversion assumes direct equivalence.
- Historical measurement precision may be limited or rounded, affecting accuracy.
- Contextual interpretation is necessary when comparing historic units with current standards.
Frequently Asked Questions
- What is a bougie decimal?
- The bougie decimal is an outdated French unit of luminous intensity used during the 19th and early 20th centuries before being replaced by the candela.
- Is the lumen per steradian different from candela?
- No, one lumen per steradian (lm/sr) is numerically equal to one candela, the SI unit of luminous intensity.
- Why convert bougie decimal to lumen/steradian?
- Converting bougie decimal values to lumen/steradian helps in interpreting historical luminous intensity data using modern, widely recognized units for practical and research purposes.
Key Terminology
- Bougie Decimal
- An obsolete French unit of luminous intensity historically used as a decimal candle measure, replaced by the candela.
- Lumen per Steradian (lm/sr)
- A unit measuring luminous intensity, representing luminous flux emitted per unit solid angle, equivalent to the candela.
- Candela
- The SI unit of luminous intensity, numerically equal to one lumen per steradian.