Why is 555 nm wavelength used in this conversion?

Because 555 nm corresponds to the peak of human photopic visual sensitivity, making it a standard reference for relating photometric and radiometric measurements.

Can I use this conversion for wavelengths other than 555 nm?

No, this conversion is specific to spectral radiance measured at 555 nm and may not be accurate for other wavelengths.

What types of light sources are suitable for this conversion?

It is ideal for small-area and high-brightness sources such as micro-LEDs, OLEDs, and devices used in vision and photometric research.

Convert Lumen/sq. cm/steradian to Watt/sq. cm/steradian (at 555 nm)

Easily convert luminance units from lumen per square centimeter per steradian to watt per square centimeter per steradian at 555 nm wavelength, aligning photometric and radiometric measures.

Lumen/sq. cm/steradian

Watt/sq. cm/steradian (at 555 nm)

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Lumen/sq. cm/steradian to Watt/sq. cm/steradian (at 555 nm) Conversion Table

Lumen/sq. cm/steradian	Watt/sq. cm/steradian (at 555 nm)

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Lumen/sq. cm/steradian to Watt/sq. cm/steradian (at 555 nm) Conversion Table
Lumen/sq. cm/steradian	Watt/sq. cm/steradian (at 555 nm)

Explore More Luminance Units Converter

What Is This Tool?

This converter transforms luminance values expressed in lumen per square centimeter per steradian into radiant spectral radiance measures in watt per square centimeter per steradian at 555 nm, the wavelength corresponding to peak human visual sensitivity.

How to Use This Tool?

Enter the luminance value in lumen per square centimeter per steradian
Select the desired output unit: watt per square centimeter per steradian at 555 nm
Click the convert button to get the equivalent radiometric spectral radiance
Use the results for calibration, design, or comparison of optical sources

Key Features

Converts photometric luminance units to radiometric spectral radiance at 555 nm
Suitable for small-area and high-brightness light source characterization
Useful for instrument calibration and optical system testing
Browser-based and easy to use
Supports applications in vision research and LED/display manufacturing

Examples

10 lumen/sq. cm/steradian converts to 0.014641288 watt/sq. cm/steradian (at 555 nm)
100 lumen/sq. cm/steradian converts to 0.14641288 watt/sq. cm/steradian (at 555 nm)

Common Use Cases

Characterizing brightness and spectral radiance of micro-LED and OLED emitters
Calibrating luminance meters and photometric instruments
Conducting optical metrology for LEDs, lamps, and illumination systems
Relating photometric measurements weighted by human eye sensitivity to radiometric values
Supporting research in vision science and display technology

Tips & Best Practices

Confirm that spectral radiance is measured at the 555 nm wavelength for accurate conversion
Use this converter when comparing or calibrating outputs under consistent spectral conditions
Consider spectral power distribution differences when applying conversions beyond 555 nm
Apply the tool for small-area or high-brightness light sources for best relevance

Limitations

Applies only to measurements specifically taken at 555 nm wavelength
May not accurately represent luminance at other wavelengths due to human eye sensitivity variations
Spectral power distribution differences can affect conversion accuracy
High-precision requirements might need full spectral data instead of single wavelength conversion

Frequently Asked Questions

Why is 555 nm wavelength used in this conversion?: Because 555 nm corresponds to the peak of human photopic visual sensitivity, making it a standard reference for relating photometric and radiometric measurements.
Can I use this conversion for wavelengths other than 555 nm?: No, this conversion is specific to spectral radiance measured at 555 nm and may not be accurate for other wavelengths.
What types of light sources are suitable for this conversion?: It is ideal for small-area and high-brightness sources such as micro-LEDs, OLEDs, and devices used in vision and photometric research.

Key Terminology

Lumen/sq. cm/steradian: A photometric luminance unit representing luminous flux per unit area and solid angle, equivalent to candela per square centimeter.
Watt/sq. cm/steradian (at 555 nm): A radiometric spectral radiance unit measuring radiant power per unit area and solid angle at 555 nm wavelength.
Steradian: A unit of measure for solid angles in three-dimensional space.

Quick Knowledge Check

What does the unit lumen/sq. cm/steradian measure?

Radiant power per area and angle

Luminous flux per unit area per unit solid angle

Spectral radiance at 555 nm

Why is the conversion to watt/sq. cm/steradian referenced at 555 nm?

Because 555 nm is the peak of human photopic sensitivity

Because 555 nm is the common emission wavelength for LEDs

Because 555 nm is the infrared wavelength standard

What is a common use case for converting lumen/sq. cm/steradian to watt/sq. cm/steradian (at 555 nm)?

For converting temperature measurements

For instrument calibration and vision research

For measuring sound intensity

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