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How to Convert from Watt/sq. cm (at 555 nm) to Lumen/square centimeter?
Learn how to convert radiant power measured in watt/sq. cm (at 555 nm) into photometric illuminance in lumen/square centimeter using this straightforward unit converter. Useful for lighting design, vision science, and safety assessments.
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Watt/sq. cm (at 555 nm) to Lumen/square centimeter Conversion Table
| Watt/sq. cm (at 555 nm) | Lumen/square centimeter |
|---|
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| Watt/sq. cm (at 555 nm) | Lumen/square centimeter |
|---|
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What Is This Tool?
This converter transforms monochromatic irradiance at 555 nm measured in watt/sq. cm into photometric illuminance expressed in lumen/square centimeter. It supports users in translating radiometric power into human-perceived brightness for various scientific, industrial, and calibration purposes.
How to Use This Tool?
- Enter the value of irradiance in watt/sq. cm at 555 nm
- Select the conversion to lumen/square centimeter
- Execute the conversion to obtain the illuminance value
- Use the result for lighting calibration, research, or safety evaluations
Key Features
- Converts monochromatic irradiance at 555 nm to photometric illuminance
- Uses the luminous efficacy factor of 683 lm/W specific to 555 nm wavelength
- Supports applications in lighting design, vision science, and safety testing
- Provides clear output in lumen/square centimeter units
- Browser-based and easy to use without additional software
Examples
- 0.5 watt/sq. cm (at 555 nm) converts to 341.5 lumen/square centimeter
- 2 watt/sq. cm (at 555 nm) converts to 1366 lumen/square centimeter
Common Use Cases
- Calibrating light sources and photometers for lighting standards
- Quantifying stimulus levels in vision experiments targeting photopic sensitivity
- Specifying exposure limits for green light sources in photobiological testing
- Measuring brightness of small LED dies and microscope slides
- Comparing optical component brightness using per square centimeter metrics
Tips & Best Practices
- Ensure measurement precision exactly at 555 nm wavelength
- Use this conversion only for monochromatic light at 555 nm
- Apply the converter for calibration to maintain standard lighting conditions
- Avoid using this conversion for broadband or other wavelength light sources
- Utilize the tool for quick conversion to support lighting design decisions
Limitations
- Applicable only for monochromatic irradiance at 555 nm
- Assumes ideal photopic response; not valid for broadband light sources
- Measurement deviations from 555 nm affect accuracy of results
Frequently Asked Questions
- Why is the wavelength 555 nm important in this conversion?
- Because 555 nm corresponds to the peak sensitivity of the human eye’s photopic response, making it the reference for converting radiant power to luminous flux.
- Can this converter be used for light sources other than 555 nm?
- No, this converter is specifically designed for monochromatic irradiance at 555 nm and is not accurate for other wavelengths or broadband light.
- What does lumen/square centimeter measure?
- It measures the luminous flux falling on one square centimeter of surface, reflecting perceived brightness weighted by the human eye’s photopic response.
Key Terminology
- Watt/sq. cm (at 555 nm)
- A radiometric irradiance unit measuring radiant power per unit area at wavelength 555 nm, used to quantify monochromatic light intensity.
- Lumen/square centimeter
- A photometric unit measuring the luminous flux on one square centimeter, representing perceived brightness weighted by the eye’s response.
- Luminous Efficacy
- A factor that converts radiant power into luminous flux based on human eye sensitivity, 683 lm/W at 555 nm for photopic vision.