What Is This Tool?
This converter allows you to switch luminous intensity measurements from the candle (pentane), a 19th-century non-SI unit based on pentane-fuel flame light, into candle (UK) [c (UK)], an old British luminous intensity unit defined by a standardized candle. It helps interpret historical photometric data and restore period lighting accurately.
How to Use This Tool?
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Enter the luminous intensity value in candle (pentane).
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Select the target unit as candle (UK) [c (UK)].
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Click the convert button to calculate the equivalent luminous intensity.
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Review the converted value based on the historical unit conversion factor.
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Use the result for analysis, comparison, or restoration projects.
Key Features
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Converts between two historical luminous intensity units: candle (pentane) and candle (UK) [c (UK)].
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Based on established conversion formula derived from these obsolete standards.
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Supports accurate interpretation of 19th and early 20th-century lighting measurements.
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Ideal for museum conservation, historical research, and educational purposes.
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Easy-to-use online interface for straightforward unit conversion.
Examples
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Convert 5 candle (pentane) to candle (UK): 5 × 0.96 = 4.8 candle (UK) [c (UK)].
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Convert 10 candle (pentane) to candle (UK): 10 × 0.96 = 9.6 candle (UK) [c (UK)].
Common Use Cases
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Interpreting early photometric measurements and lighting specs that use pentane candle standards.
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Calibrating or reproducing lighting for museums and conservation requiring period-accurate illumination.
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Studying historical photometry and the evolution of light measurement units.
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Restoring historical lighting in theatres and heritage buildings to original standards.
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Converting British archival lighting data for comparison or analysis.
Tips & Best Practices
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Verify the historical context of your photometric data before conversion.
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Use conversions primarily for educational, historical research, or conservation work.
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Be aware the units are obsolete and may have varied historically based on apparatus.
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Compare converted values cautiously due to approximate definitions and conditions.
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Document the source and conversion method when applying this data.
Limitations
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Both candle (pentane) and candle (UK) are outdated and non-SI units.
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Their definitions varied historically and depend on specific measurement equipment.
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Conversion represents an approximation rather than precise equivalence.
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Not suitable for modern photometric precision or scientific purposes.
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Primarily intended for historical interpretation, educational use, and conservation.
Frequently Asked Questions
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What is candle (pentane)?
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Candle (pentane) is a historical luminous intensity unit based on a standard pentane-fuel flame, used as a reference in early photometry before modern SI units.
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Why convert candle (pentane) to candle (UK)?
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Converting between these units helps interpret and compare historical lighting data from different 19th and early 20th century standards, useful in research and restoration.
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Is this conversion precise for modern applications?
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No, both units are obsolete and approximate; this conversion is intended for historical and educational purposes rather than modern photometric accuracy.
Key Terminology
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Candle (pentane)
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A non-SI luminous intensity unit based on the light from a standardized pentane flame, used historically for photometric reference.
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Candle (UK) [c (UK)]
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An obsolete British luminous intensity unit defined by a standardized candle, used for photometric standards before the candela.
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Luminous Intensity
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The measure of the wavelength-weighted power emitted by a light source in a particular direction, perceived by the human eye.