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How to Convert from Candle (pentane) to Lumen/steradian [lm/sr]
Learn how to convert luminous intensity units from the historical candle (pentane) to the modern and standardized lumen per steradian [lm/sr]. Understand definitions, uses, and conversion applications.
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Candle (pentane) to Lumen/steradian [lm/sr] Conversion Table
| Candle (pentane) | 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.
| Candle (pentane) | Lumen/steradian [lm/sr] |
|---|
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What Is This Tool?
This converter allows you to translate luminous intensity values from the obsolete candle (pentane) unit—based on a pentane-fueled flame—to the contemporary lumen per steradian (lm/sr), an SI-aligned unit equivalent to the candela. This facilitates understanding and comparing historical light measurements with modern standards.
How to Use This Tool?
- Enter the luminous intensity value in candle (pentane) units
- Select the target unit as lumen/steradian [lm/sr]
- Initiate the conversion to see the equivalent luminous intensity
- Use results for historical data analysis or modern photometric applications
Key Features
- Converts luminous intensity values from candle (pentane) to lumen per steradian [lm/sr]
- Supports interpretation of historical photometric data and lamp specifications
- Facilitates calibration and reproduction of period-accurate lighting
- Uses direct 1:1 conversion rate for straightforward calculations
- Browser-based and easy to use without additional software
Examples
- Converting 5 candle (pentane) results in 5 lumen/steradian [lm/sr]
- Converting 0.75 candle (pentane) equals 0.75 lumen/steradian [lm/sr]
Common Use Cases
- Interpreting photometric measurements from the 19th and early 20th centuries referencing pentane candle standards
- Calibrating and reproducing lighting setups for museums and conservation work requiring period-accurate illumination
- Standardizing historical luminous intensity data into contemporary units for research and educational purposes
- Specifying rated luminous intensity for LEDs, indicator lamps, and flashlights
- Comparing beam patterns of vehicle headlights and stage lighting during photometric testing
- Calibrating instruments that measure light distribution as luminous flux per solid angle
Tips & Best Practices
- Always verify whether historical data used matches the pentane candle definition variant
- Use the conversion to harmonize obsolete measurements with current lighting standards
- Apply the tool for educational demonstrations about the evolution of light measurement
- Cross-check converted values in photometric testing for consistency
- Use results prudently in modern settings, considering the obsolescence of candle (pentane)
Limitations
- The candle (pentane) unit's definition historically differed by equipment, so its equivalence to lumen/steradian may vary slightly
- As an obsolete and non-SI unit, candle (pentane) is rarely used in current photometric applications
- Careful interpretation is required when working with older light measurement data
- Modern applications predominantly rely on lumen/steradian or candela units
Frequently Asked Questions
- What is a candle (pentane) unit?
- It is a historical, non-SI unit of luminous intensity defined by the light emitted from a standardized pentane-fueled flame used as a photometric reference in early lighting measurements.
- Is 1 candle (pentane) equal to 1 lumen per steradian?
- Yes, the conversion rate is 1 candle (pentane) equals 1 lumen/steradian [lm/sr], which is numerically equivalent to 1 candela.
- Why convert candle (pentane) to lumen/steradian?
- Conversion enables interpretation and comparison of historical luminous intensity values within modern standardized units used for lighting design, testing, and calibration.
Key Terminology
- Candle (pentane)
- A historical, non-SI luminous intensity unit based on the light from a pentane-fueled flame, used in early photometry and lamp testing.
- Lumen per steradian [lm/sr]
- A modern unit measuring luminous intensity as luminous flux emitted per unit solid angle; it is numerically equal to the candela.
- Luminous intensity
- The measure of visible light power emitted by a source per unit solid angle, weighted according to human visual sensitivity.