What Is This Tool?
This tool allows you to convert luminance measurements from stilb (sb), a CGS photometric unit, into candela per square foot, an imperial unit used to express luminous intensity per unit area.
How to Use This Tool?
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Enter the luminance value in stilb (sb) that you want to convert.
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Select stilb as the input unit and candela per square foot as the output unit.
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Click the convert button to get the equivalent luminance value in candela per square foot.
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Use the result for lighting specification, research, or display calibration needs.
Key Features
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Converts luminance values between stilb and candela per square foot accurately using the defined conversion rate.
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Supports usage scenarios in optical research, lighting design, and display brightness calibration.
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Browser-based and easy to use with clear input and output formats.
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Useful for translating historical photometric data into practical units for modern applications.
Examples
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2 stilb (sb) equals approximately 1858.06 candela per square foot.
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0.5 stilb (sb) converts to about 464.52 candela per square foot.
Common Use Cases
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Converting historical or legacy luminance data reported in CGS units into imperial units.
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Specifying and verifying display screen brightness where area is measured in square feet.
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Calibrating projection screen luminance in cinema and theater environments.
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Lighting design and signage assessments following imperial measurement standards.
Tips & Best Practices
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Ensure you understand the context of units to maintain conversion accuracy.
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Use this conversion when working between legacy CGS data and modern imperial measurement applications.
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Double-check results when applying them in international or SI unit standard contexts.
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Be aware that stilb is less common today and candela per square foot is a non-SI unit.
Limitations
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Stilb is a CGS unit and not widely used in contemporary photometric measurements.
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Candela per square foot is a non-SI unit and may require additional conversion for international standards.
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Conversion accuracy depends on the precise context and understanding of unit applications.
Frequently Asked Questions
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What is stilb (sb) used for?
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Stilb is a CGS unit of luminance used historically in optical research and older literature to describe surface brightness.
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Why convert stilb to candela per square foot?
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Converting stilb to candela per square foot helps translate older CGS measurements into practical imperial units used in lighting, display, and projection calibrations.
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Is candela per square foot an SI unit?
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No, candela per square foot is a non-SI (imperial) unit commonly used where area is measured in square feet.
Key Terminology
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Stilb (sb)
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A CGS photometric unit of luminance equal to 10,000 candela per square meter, representing brightness emitted or reflected from a surface.
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Candela per square foot
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A non-SI unit of luminance expressing luminous intensity per square foot area, used often in lighting and display measurements within imperial systems.