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Lighting Wattage Formula:
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The lighting wattage calculation determines the total wattage needed to properly illuminate a room based on its area and the recommended wattage per square foot. This helps ensure adequate lighting for the space while optimizing energy efficiency.
The calculator uses the lighting wattage formula:
Where:
Explanation: The calculation multiplies the room area by the recommended wattage per square foot to determine the total lighting wattage needed for proper illumination.
Details: Proper lighting wattage ensures adequate visibility for tasks while avoiding energy waste. Different room types (kitchens, offices, bedrooms) may require different wattage per square foot.
Tips: Enter room area in square feet and the recommended wattage per square foot (default is 1.5 W/ft² for general lighting). All values must be positive numbers.
Q1: What's the typical wattage per square foot for different rooms?
A: General lighting: 1.5 W/ft²; Task lighting: 2.5 W/ft²; Accent lighting: 0.5 W/ft². Kitchens and workspaces often need more.
Q2: How does LED lighting affect this calculation?
A: LED lights use fewer watts for the same brightness. You may need to adjust calculations based on lumens rather than watts.
Q3: Should I consider room height in the calculation?
A: Taller rooms (over 10 feet) may need additional lighting. Consider increasing wattage by 10-20% for each additional foot.
Q4: How do I account for natural light?
A: Rooms with ample natural light may need 20-50% less artificial lighting depending on window size and orientation.
Q5: What about different types of light fixtures?
A: The calculation provides total wattage which can be distributed among multiple fixtures. Consider placement for even illumination.