Lumens to Watts Converter
This calculator helps you convert lumens to watts, essential for selecting energy-efficient lighting. Whether you're an energy-conscious consumer or a professional in lighting design, this tool simplifies the process of understanding your power needs.
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Data Source and Methodology
All calculations are based on standard conversion formulas provided by the International Commission on Illumination (CIE). Consult their documentation for further information.
The Formula Explained
Formula: \[ \text{Watts} = \frac{\text{Lumens}}{\text{Efficiency (lumens/watt)}} \]
Glossary of Terms
- Lumens: A measure of the total quantity of visible light emitted by a source.
- Efficiency: The effectiveness of a light source in converting energy into light, measured in lumens per watt.
- Watts: A unit of power, representing the rate of energy conversion or transfer.
How It Works: A Step-by-Step Example
For a light source emitting 800 lumens with an efficiency of 80 lumens per watt, the required power is calculated as:
\[ \text{Watts} = \frac{800}{80} = 10 \text{ watts} \]
Frequently Asked Questions (FAQ)
What are Lumens?
Lumens measure the total amount of visible light emitted by a source. More lumens mean brighter light.
How do I choose the right efficiency?
Efficiency varies by light type. LED bulbs typically range from 80 to 100 lumens per watt.
Can this calculator be used for LED lights?
Yes, the calculator is suitable for any light source, including LEDs.
Why is efficiency important?
Higher efficiency means more light output for less power, leading to energy savings.
Can I convert watts to lumens?
Yes, by rearranging the formula: Lumens = Watts × Efficiency.