What Is This Tool?
This converter helps you change values from meter-candle [m*c], an older unit of illuminance, to candela steradian per square meter, a unit equivalent to lux used in modern photometry and lighting engineering.
How to Use This Tool?
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Enter the illuminance value in meter-candle [m*c]
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Select meter-candle as the input unit
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Choose candela steradian per square meter as the output unit
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Click convert to see the equivalent value
Key Features
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Converts meter-candle [m*c] to candela steradian per square meter with a 1:1 conversion rate
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Supports illuminance measurement conversions important for lighting design and calibration
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Facilitates alignment of historical and modern lighting data
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Browser-based and easy to use without requiring specialized software
Examples
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100 meter-candle [m*c] converts to 100 candela steradian/sq. meter
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450 meter-candle [m*c] converts to 450 candela steradian/sq. meter
Common Use Cases
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Comparing and specifying room and worksurface lighting levels
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Interpreting older photometry and lighting design literature
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Calibrating illuminance measurements in photography and lighting testing
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Designing and assessing indoor and outdoor illumination standards
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Calibrating instruments and performing exposure measurements
Tips & Best Practices
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Confirm unit names in documentation to avoid confusion between meter-candle and lux
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Use this tool to update legacy data to modern photometric standards
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Verify lighting levels in both units when working with historical datasets
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Use consistent units in lighting design and calibration for accurate comparisons
Limitations
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Meter-candle is an older term and may not be universally recognized in current standards
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Ensure clarity of units to avoid misinterpretation across different disciplines
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This conversion does not change the numerical value since units are equivalent
Frequently Asked Questions
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What is a meter-candle?
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Meter-candle is an older unit of illuminance equal to one lumen per square meter and numerically the same as lux.
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Is there any difference between meter-candle and candela steradian per square meter?
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No, both units are numerically equivalent; meter-candle is simply an older term for what is now commonly called lux or candela steradian per square meter.
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Why convert from meter-candle to candela steradian per square meter?
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Conversion helps align older lighting data and literature with modern photometric units used in current lighting design and instrument calibration.
Key Terminology
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Meter-candle [m*c]
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An older unit of illuminance equal to one lumen per square meter, representing illumination at one meter from a one candela source.
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Candela steradian per square meter
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A unit measuring illuminance equivalent to lux, defined as luminous flux incident on a surface per unit area.
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Lux
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The SI unit of illuminance, numerically equal to meter-candle and candela steradian per square meter.