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How to Convert from Lumen/square meter [lm/m^2] to Watt/sq. cm (at 555 nm)?
Learn how to convert illumination units from lumen per square meter to watt per square centimeter at 555 nm wavelength using our online unit converter tool designed for lighting and photometric measurements.
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Lumen/square meter [lm/m^2] to Watt/sq. cm (at 555 nm) Conversion Table
| Lumen/square meter [lm/m^2] | 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.
| Lumen/square meter [lm/m^2] | Watt/sq. cm (at 555 nm) |
|---|
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- How to convert from lumen/square meter [lm/m^2] to watt/sq. cm (at 555 nm)?
What Is This Tool?
This unit converter transforms illumination values from lumen per square meter, a photometric measure, to watt per square centimeter at 555 nm, a radiometric measure. It is useful for converting light measurements relevant to lighting design, vision science, and photobiology.
How to Use This Tool?
- Enter the illumination value in lumen per square meter (lm/m^2) into the input field.
- Select watt per square centimeter at 555 nm as the target unit.
- Click the convert button to get the equivalent radiometric measurement.
Key Features
- Converts illumination from lumen/square meter [lm/m^2] to watt/sq. cm specifically at 555 nm wavelength.
- Uses a verified conversion rate applying the luminous efficacy of 683 lm/W for accurate unit translation.
- Supports applications in lighting calibration, scientific experiments, and exposure setting.
Examples
- Convert 100 lm/m^2: 100 × 1.4641288433382e-7 = 1.4641288e-5 W/cm².
- Convert 1000 lm/m^2: 1000 × 1.4641288433382e-7 = 1.4641288e-4 W/cm².
Common Use Cases
- Verifying lighting levels for workspaces and public areas.
- Calibrating light sources and photometers in lighting design standards.
- Measuring exposure in photography and cinematography for proper lighting setup.
- Quantifying monochromatic stimulus in vision science experiments at 555 nm.
- Specifying safety limits for green optical sources in photobiological testing.
- Controlling light delivery for plants in horticulture and greenhouse environments.
Tips & Best Practices
- Ensure the light source is monochromatic at 555 nm for accurate conversion.
- Use this converter to transition between photometric and radiometric units in relevant experiments.
- Verify lighting conditions match the spectral assumptions of the tool.
- Understand that the conversion assumes a luminous efficacy of 683 lm/W.
Limitations
- Applicable only for monochromatic light at 555 nm wavelength.
- Does not directly apply to broad-spectrum or polychromatic light sources.
- Accuracy depends on the spectral purity and may vary for non-ideal sources.
Frequently Asked Questions
- What does lumen per square meter [lm/m^2] measure?
- Lumen per square meter quantifies illuminance as luminous flux per area, weighted by the human eye’s photopic response, and is equivalent to lux.
- Why is 555 nm wavelength important in this conversion?
- Because 555 nm corresponds to the peak of the photopic luminous-efficiency function, making it a standard reference for converting between photometric and radiometric units.
- Can this conversion be used for all types of light sources?
- No, this conversion specifically applies to monochromatic light at 555 nm and may not be accurate for broad-spectrum or mixed-wavelength sources.
Key Terminology
- Lumen per square meter [lm/m^2]
- A photometric unit of illuminance representing luminous flux arriving at one square meter, equivalent to lux.
- Watt per square centimeter at 555 nm
- A radiometric unit measuring radiant power per area at the specific 555 nm wavelength, used for monochromatic irradiance.
- Luminous efficacy
- The factor of 683 lm/W representing the maximum photopic luminous efficiency used in this conversion.