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Lux To PAR Conversion Formula:
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Lux to PAR conversion is a method to convert illuminance (measured in lux) to photosynthetically active radiation (PAR) measured in μmol/m²/s. This conversion is important in plant biology and agriculture to measure the light available for photosynthesis.
The calculator uses the conversion formula:
Where:
Explanation: The conversion factor varies depending on the light source and its spectral distribution. Different light sources have different conversion factors.
Details: Accurate PAR measurement is crucial for optimizing plant growth, determining light requirements for different plant species, and ensuring proper photosynthesis in controlled environments.
Tips: Enter lux value and the appropriate conversion factor for your light source. Both values must be positive numbers.
Q1: What is the typical conversion factor for sunlight?
A: For sunlight, the conversion factor is approximately 0.0185 μmol/lx, but this can vary depending on atmospheric conditions.
Q2: How does the conversion factor vary for different artificial light sources?
A: LED lights typically have conversion factors between 0.013-0.020 μmol/lx, while fluorescent lights range from 0.011-0.016 μmol/lx.
Q3: Why is PAR more relevant than lux for plant growth?
A: PAR measures the photosynthetically active radiation spectrum (400-700 nm) that plants actually use for photosynthesis, while lux measures human-perceived brightness.
Q4: Can I use a single conversion factor for all light sources?
A: No, different light sources have different spectral distributions, so each requires its own specific conversion factor for accurate results.
Q5: How accurate is lux to PAR conversion?
A: The accuracy depends on the quality of the conversion factor used. For precise measurements, dedicated PAR meters are recommended.