What Is This Tool?
This online converter allows you to convert units of luminous intensity from the obsolete candle (international) to the candle (pentane), both historical photometric standards. It serves those interpreting legacy lighting data or conducting studies on the history of light measurement.
How to Use This Tool?
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Enter the luminous intensity value measured in candle (international)
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Select 'candle (international)' as the source unit
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Choose 'candle (pentane)' as the target unit
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Click the convert button to see the equivalent luminous intensity
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Use the conversion results for research, conservation, or educational purposes
Key Features
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Converts between candle (international) and candle (pentane) units of luminous intensity
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Supports historical and legacy lighting measurement conversions
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Easy, browser-based interface accessible without installation
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Provides straightforward equality conversion based on 1:1 relation
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Includes example conversions for better understanding
Examples
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5 candle (international) = 5 candle (pentane)
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0.1 candle (international) = 0.1 candle (pentane)
Common Use Cases
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Decoding and comparing luminous intensities in pre-SI lighting standards
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Analyzing historical photometric data and lamp specifications
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Museum lighting calibrations requiring period-accurate illumination
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Educational demonstrations on historical light measurement units
Tips & Best Practices
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Use this conversion primarily for historical or legacy lighting analysis
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Refer to original documentation when available for context on unit definitions
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Apply results carefully when engaging in conservation or museum lighting work
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Recognize that modern applications prefer SI candela units for precision
Limitations
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Units are outdated and may vary slightly according to original definitions and equipment
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Conversion precision is limited due to lack of standardized modern reference
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Not suitable for contemporary scientific or engineering luminous intensity measurements
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Intended mainly for historical study, legacy data interpretation, and education
Frequently Asked Questions
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Why are candle (international) and candle (pentane) considered obsolete?
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Both units were used historically before the adoption of the SI candela and are no longer standard; their values can vary depending on old equipment and definitions.
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Can this conversion be used for modern lighting measurements?
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No, these units are intended for historical or legacy analysis, not for precise modern photometric applications.
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What is the exact conversion rate between candle (international) and candle (pentane)?
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The conversion is exactly 1 candle (international) equals 1 candle (pentane).
Key Terminology
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Candle (international)
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A former photometric unit representing luminous intensity based on a specified standard lamp, now obsolete and used mainly in older literature.
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Candle (pentane)
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An old non-SI unit of luminous intensity derived from a pentane flame standard, used in early photometry before being replaced by the candela.
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Luminous Intensity
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A measure of the amount of light emitted by a source in a particular direction.