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How to Convert from Bougie Decimal to Hefner Candle
Convert luminous intensity values from the obsolete French unit bougie decimal to the historical German unit hefner candle using this easy online converter tool. Ideal for archival, research, and educational purposes.
Please check your input. It must be a valid numeric value.
Bougie decimal to Hefner candle Conversion Table
| Bougie decimal | Hefner candle |
|---|
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 | Hefner candle |
|---|
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What Is This Tool?
This converter changes luminous intensity values measured in bougie decimal to hefner candle. Both units are historical and obsolete, once used in French and German-speaking countries respectively, before being replaced by the modern candela unit.
How to Use This Tool?
- Enter the luminous intensity value in bougie decimal
- Select bougie decimal as the input unit and hefner candle as the output unit
- Click the conversion button to see the result in hefner candle
- Use the converted value for historical data interpretation or research
Key Features
- Converts from the French unit bougie decimal to the German hefner candle
- Based on historic luminous intensity standards from the 19th and early 20th centuries
- Useful for historical research, archival restoration, and academic study
- Browser-based tool requiring no installation
- Simple interface with direct input and output of values
Examples
- 2 bougie decimals equals 2 × 1.111111111 = 2.222222222 hefner candles
- 5 bougie decimals equals 5 × 1.111111111 = 5.555555555 hefner candles
Common Use Cases
- Interpreting 19th and early 20th-century French luminous intensity data
- Converting historic German and Austrian photometric readings expressed in hefner candles
- Archival research requiring translation of old lighting standards
- Restoring and calibrating antique photometric instruments referencing these units
- Academic study on the evolution of photometric units
Tips & Best Practices
- Verify the historical context of your luminous intensity data before conversion
- Use this conversion only for archival or educational purposes, not for modern photometry
- Understand that historical measurement conditions varied, so approximate equivalence may occur
- Cross-check converted values with original documentation when possible
Limitations
- Both units are obsolete and mainly serve historical and research contexts
- Variations in historical lamp standards can affect conversion accuracy
- Not suitable for modern luminous intensity measurements or applications
- Precise equivalence may be inconsistent due to historical measurement variability
Frequently Asked Questions
- What is a bougie decimal?
- The bougie decimal is an obsolete French unit of luminous intensity used historically as a decimal-based candle measure during metrication efforts in the 19th and early 20th centuries.
- What is a hefner candle?
- The hefner candle is an outdated unit of luminous intensity defined by the light from a standardized Hefner lamp burning amyl acetate, historically used in German-speaking countries.
- Why convert between bougie decimal and hefner candle?
- Converting between these units helps interpret and translate historical luminous intensity measurements from French and German standards for archival research and restoration.
Key Terminology
- Bougie Decimal
- An obsolete French luminous intensity unit used as a decimal-based candle measure during 19th–early 20th century metrication.
- Hefner Candle
- An outdated luminous intensity unit defined by the light emitted from a standard Hefner lamp burning amyl acetate, used historically in German-speaking regions.
- Luminous Intensity
- A measurement of the wavelength-weighted power emitted by a light source in a particular direction, historically expressed in various units including bougie decimal and hefner candle.