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How to Convert from Candle (international) [c] to Lumen/steradian [lm/sr]
Learn how to convert luminous intensity values from the obsolete candle (international) unit to lumen/steradian (lm/sr), the modern SI-equivalent unit for measuring directional brightness of light sources. This guide covers key features, usage steps, and practical examples for accurate photometric conversions.
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Candle (international) [c] to Lumen/steradian [lm/sr] Conversion Table
| Candle (international) [c] | 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 (international) [c] | Lumen/steradian [lm/sr] |
|---|
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What Is This Tool?
This unit converter allows you to transform luminous intensity measurements from the historic candle (international) to the modern lumen per steradian (lm/sr) unit, which is equivalent to the SI candela. It supports translating older lighting specifications into contemporary standards.
How to Use This Tool?
- Enter the luminous intensity value expressed in candle (international) [c].
- Select 'candle (international) [c]' as the input unit and 'lumen/steradian [lm/sr]' as the output unit.
- Click the convert button to obtain the equivalent luminous intensity in lumen/steradian.
- Use the converted value for modern photometric assessments or engineering applications.
Key Features
- Converts candle (international), an obsolete luminous intensity unit, into lumen/steradian (lm/sr).
- Supports photometric calculations for lighting design and historical data interpretation.
- Browser-based and easy to use for translating legacy standards into modern measurements.
- Employs a one-to-one conversion rate ensuring direct unit equivalence.
- Facilitates compatibility with current engineering and calibration practices.
Examples
- 5 candle (international) [c] equals 5 lumen/steradian [lm/sr].
- 0.75 candle (international) [c] equals 0.75 lumen/steradian [lm/sr].
Common Use Cases
- Translating historical luminous intensity data for lighting engineering and design.
- Interpreting and converting legacy lighting standards and datasheets into modern units.
- Calibrating photometric instruments using modern SI units for accurate measurements.
- Performing photometric testing on vehicle headlights, streetlights, and LED indicators.
- Supporting lighting research that involves historical or pre-SI unit documentation.
Tips & Best Practices
- Always verify the source of historical candle (international) values due to potential variations.
- Use this conversion mainly to bridge legacy data with modern measurement systems.
- Confirm the purpose of conversion aligns with current photometric standards for accuracy.
- Remember that the candle (international) is outdated and modern devices use candela (lm/sr).
Limitations
- The candle (international) is an obsolete unit and may not have the precision of modern SI units.
- Historical data using this unit might vary because of earlier non-standardized reference lamps.
- Modern applications predominantly require the use of lumen/steradian or candela for consistent results.
Frequently Asked Questions
- What is the candle (international) unit?
- The candle (international) is an obsolete photometric unit formerly used to measure luminous intensity based on a standard lamp, now replaced by the candela.
- Is 1 candle (international) equal to 1 lumen/steradian?
- Yes, 1 candle (international) corresponds exactly to 1 lumen/steradian, which is numerically equal to 1 candela.
- Why convert from candle (international) to lumen/steradian?
- Conversions are needed to translate historical luminous intensity values into modern SI units to maintain compatibility with current photometric measurements and engineering standards.
Key Terminology
- Candle (international)
- An obsolete photometric unit used historically to specify luminous intensity based on a standard lamp before adoption of the SI candela.
- Lumen/steradian [lm/sr]
- A unit measuring luminous intensity; luminous flux emitted per unit solid angle, equivalent to the modern candela.