What Is This Tool?
This converter translates luminous intensity measurements from pentane candle (10 candle power), a historic standard based on a pentane-burning candle, into the bougie decimal, an obsolete French unit. Both units are primarily relevant for historical and archival purposes related to 19th and early 20th century photometric data.
How to Use This Tool?
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Enter the luminous intensity value in pentane candle (10 candle power)
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Choose bougie decimal as the target unit
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Submit the value to get the conversion result
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Use the conversion to interpret historical lighting data
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Apply the results in archival or educational research
Key Features
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Converts between two historical luminous intensity units
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Supports archival and historical photometry research
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Browser-based and easy to use
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Facilitates interpretation of vintage lighting standards
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Ideal for educational and restoration contexts
Examples
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1 Pentane candle (10 candle power) equals 10 Bougie decimal
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3 Pentane candles (10 candle power) equals 30 Bougie decimal
Common Use Cases
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Interpret historic French lighting standards and documents
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Convert old photometric measurements for restoration projects
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Support archival research into early luminous intensity units
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Assist education on the evolution of photometric units
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Translate vintage lamp specifications using obsolete measures
Tips & Best Practices
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Ensure you enter values based on historical context
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Use results mainly for archival or educational purposes
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Cross-check conversions when applying to restoration work
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Remember these units do not match modern SI candela exactly
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Consult original documents for clarity when possible
Limitations
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Both pentane candle and bougie decimal are obsolete and non-SI units
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Historical measurement inconsistencies mean exact equivalence may vary
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Rarely applied in current practical lighting measurements
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Conversion serves mostly archival and academic needs
Frequently Asked Questions
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What is a pentane candle (10 candle power)?
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It is a historical luminous intensity unit based on a pentane-burning standard candle, defined as ten times the traditional candle power.
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What does bougie decimal mean?
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Bougie decimal is an obsolete French unit of luminous intensity used during 19th and early 20th century metrication, serving as a decimal candle measure.
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Why convert between these obsolete units?
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Conversion helps interpret and translate historic photometric data in archival, restoration, and educational contexts related to early lighting standards.
Key Terminology
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Pentane Candle (10 Candle Power)
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A historical luminous intensity unit based on a pentane-burning candle, equal to 10 standard candle power.
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Bougie Decimal
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An obsolete French luminous intensity unit used in 19th–early 20th century metrication efforts, functioning as a decimal candle measure.
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Luminous Intensity
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A measurement of the power emitted by a light source in a particular direction.