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How to Convert from Lux [lx] to Watt/sq. cm (at 555 nm)?
Convert illuminescence values from lux (lx) to radiant power per unit area at 555 nm wavelength using our precise online tool designed for lighting, vision science, and photobiological applications.
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Lux [lx] to Watt/sq. cm (at 555 nm) Conversion Table
| Lux [lx] | Watt/sq. cm (at 555 nm) |
|---|
Custom Unit Conversion Table Generator – Instant Printable Conversion Tables
Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
| Lux [lx] | Watt/sq. cm (at 555 nm) |
|---|
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What Is This Tool?
This converter transforms illumination measurements from lux, which reflect luminous flux weighted by human visual sensitivity, into radiometric units of watt per square centimeter at 555 nm. It supports accurate calibration and research involving the peak sensitivity of human photopic vision.
How to Use This Tool?
- Enter the illuminance value in lux [lx].
- Select lux as the input unit and watt/sq. cm (at 555 nm) as the output unit.
- Click convert to obtain the equivalent radiometric irradiance value.
- Use the results for calibration, design, or safety compliance purposes.
Key Features
- Converts lux (photometric illuminance) to watt/sq. cm at 555 nm (radiometric irradiance).
- Applies to calibration of lighting equipment and photometric instruments.
- Supports vision science experiments focused on photopic sensitivity.
- Useful for photobiological safety testing of green optical sources.
- Browser-based and easy to use with clear unit definitions.
Examples
- 500 lx converts to approximately 7.320644216691e-5 watt/sq. cm at 555 nm.
- 1000 lx converts to approximately 1.4641288433382e-4 watt/sq. cm at 555 nm.
Common Use Cases
- Lighting design and ensuring standards compliance for indoor and outdoor environments.
- Calibrating light sources, photometers, and lux meters for accurate measurements.
- Conducting vision science and psychophysics research focusing on the 555 nm photopic peak.
- Specifying exposure parameters and safety guidelines for green spectral optical devices.
Tips & Best Practices
- Ensure input values are accurate and based on proper photometric measurements.
- Use this conversion only at the specified wavelength of 555 nm for meaningful results.
- Cross-check calibration tools frequently when working with sensitive optical instruments.
- Apply conversion in controlled conditions to reduce spectral distribution discrepancies.
Limitations
- Conversion is valid only at the monochromatic wavelength 555 nm, the peak of photopic vision.
- Does not accurately apply to other wavelengths or broadband light sources.
- Spectral power distribution variations can affect the conversion's precision in practical use.
Frequently Asked Questions
- What does the unit lux [lx] measure?
- Lux measures illuminance as luminous flux per square meter, accounting for human daylight visual response.
- Why is the wavelength 555 nm important for this conversion?
- Because 555 nm corresponds to the maximum sensitivity peak of human photopic vision, making it a standard reference point.
- Can this conversion be used for any light source?
- No, it is specifically designed for monochromatic light at 555 nm and may not be precise for other wavelengths or mixed spectra.
Key Terminology
- Lux [lx]
- The unit of illuminance equal to one lumen per square meter, representing luminous flux on a surface weighted by human daylight vision.
- Watt/sq. cm (at 555 nm)
- A radiometric unit measuring radiant power incident per square centimeter at the 555 nm wavelength, corresponding to the photopic luminous efficiency peak.
- Photopic luminous-efficiency function
- A reference function describing the spectral sensitivity of human daylight vision, peaking at 555 nm.