What Is This Tool?
This tool converts illumination measurements from nox, a unit specialized for near-dark light levels, into candela steradian per square meter, a conventional unit equivalent to lux used widely in lighting engineering.
How to Use This Tool?
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Enter the illuminance value in nox you wish to convert.
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Select 'nox' as the source unit and 'candela steradian/sq. meter' as the target unit.
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Click the convert button to see the equivalent value in candela steradian/sq. meter.
Key Features
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Converts very low illuminance values from nox to candela steradian/sq. meter.
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Provides a straightforward interface for fast unit translation.
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Helpful for lighting design, astronomy, and environmental applications.
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Browser-based and easy to use with no installation required.
Examples
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5 nox converts to 0.005 candela steradian/sq. meter.
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100 nox converts to 0.1 candela steradian/sq. meter.
Common Use Cases
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Describing natural night illumination like moonlight or starlight in astronomy.
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Planning exterior lighting with consideration for dark-sky environments.
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Testing low-light conditions in optical sensor calibration.
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Designing indoor and outdoor lighting based on standardized photometric units.
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Calibrating light meters used in photography and instrument measurements.
Tips & Best Practices
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Use this tool primarily for low-illuminance scenarios as nox is designed for near-dark conditions.
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Verify measurement precision when converting very low values due to instrument limits.
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Apply the converted values to standard lighting design and environmental studies.
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Combine conversion results with context-specific lighting requirements for best outcomes.
Limitations
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Accuracy may be affected when measuring extremely low light levels.
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Not suitable for converting high-intensity illumination values.
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Applies mainly to scenarios involving very low illuminance.
Frequently Asked Questions
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What does the unit nox measure?
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Nox is a specialized unit that quantifies very low illuminance levels, typically encountered in near-dark conditions such as moonlight or starlight.
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How is candela steradian per square meter related to lux?
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Candela steradian per square meter is numerically equivalent to lux, measuring luminous flux incident per unit area.
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Why convert from nox to candela steradian/sq. meter?
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Converting to candela steradian per square meter translates low-level illuminance into a standard photometric unit useful for lighting design and measurement.
Key Terminology
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Nox
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A historical unit measuring very low illuminance, equal to 0.001 lux, used in near-dark or night-time lighting contexts.
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Candela steradian per square meter (cd·sr·m⁻²)
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A unit of illuminance equivalent to lux, measuring luminous flux incident on a surface per unit area.
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Illuminance
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The amount of luminous flux falling on a surface per unit area, commonly measured in lux or equivalent units.