What Is This Tool?
This unit converter allows you to convert illumination measurements from meter-candle [m*c], an older unit equivalent to lux, to nox, a specialized unit used for very low light levels. It helps translate standard lighting values into precise measurements for dim environments.
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 [m*c] as the input unit.
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Choose nox as the output unit for low light measurements.
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Press convert to obtain the equivalent value in nox.
Key Features
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Converts meter-candle [m*c] to nox accurately based on defined conversion rates.
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Supports lighting measurements relevant to both standard and very low illumination levels.
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Useful for applications in astronomy, environmental science, and optical sensor testing.
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Browser-based and easy to use without the need for complex calculations.
Examples
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5 m*c converts to 5000 nox by multiplying 5 by 1000.
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0.2 m*c converts to 200 nox by multiplying 0.2 by 1000.
Common Use Cases
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Comparing or specifying room or worksurface lighting with meter-candle values.
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Interpreting historical lighting literature using meter-candle terminology.
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Measuring very low natural night illumination like moonlight and starlight with nox.
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Designing exterior lighting that minimizes stray or background light using nox.
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Testing low-light conditions for sensitive optical instruments.
Tips & Best Practices
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Use meter-candle units when dealing with typical lighting levels like office illumination.
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Switch to nox units to measure very low or night-time ambient light environments.
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Remember the equivalence of 1 m*c to 1000 nox for straightforward conversions.
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Confirm your lighting context to select the appropriate unit for clarity and precision.
Limitations
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The nox unit is intended for very low illuminance and may produce large numbers if converting from high meter-candle values.
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The equivalence between meter-candle and lux assumes standard conditions that may not apply to all lighting situations.
Frequently Asked Questions
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What is the difference between meter-candle and nox?
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Meter-candle is an older unit equivalent to lux measuring standard illuminance, while nox is a specialized unit for very low illuminance levels used in near-dark conditions.
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Why convert meter-candle to nox?
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Converting from meter-candle to nox helps quantify very low light conditions such as natural night illumination, which meter-candle values are too large to describe accurately.
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Is 1 meter-candle equal to 1 lux?
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Yes, meter-candle is numerically equivalent to the SI unit lux, representing illuminance of one lumen per square meter.
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 metre, equivalent to lux, indicating the light on a surface from a point source of one candela at one metre.
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Nox
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A specialized unit of illuminance equal to one millilux (0.001 lux), used to measure very low light levels such as moonlight or stray lighting in dark environments.