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Lumens Per Square Foot Formula:
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Lumens per square foot (also known as foot-candles) is a measurement of illuminance that indicates how much light is falling on a surface area. It's an important metric in lighting design to ensure adequate illumination for various tasks and environments.
The calculator uses the simple formula:
Where:
Explanation: This calculation helps determine the intensity of light distributed over a given area, which is crucial for proper lighting design.
Details: Proper lighting calculation ensures adequate illumination for safety, productivity, and comfort in various environments from homes and offices to industrial spaces and outdoor areas.
Tips: Enter the total lumens output of your light sources and the area in square feet that needs to be illuminated. Both values must be positive numbers.
Q1: What is a good lumens per square foot value for a living room?
A: Typically, 10-20 lumens per square foot is recommended for living rooms, but this can vary based on specific needs and preferences.
Q2: How many lumens per square foot for a kitchen?
A: Kitchens generally require 30-40 lumens per square foot for task lighting, with additional lighting for specific work areas.
Q3: What's the difference between lumens and lux?
A: Lumens measure total light output, while lux measures illuminance (lumens per square meter). Lumens per square foot is the imperial equivalent of lux.
Q4: How do I calculate total lumens from multiple light sources?
A: Add together the lumen output of all individual light bulbs or fixtures that will illuminate the space.
Q5: Does room color affect lumens per square foot requirements?
A: Yes, darker colored rooms typically require more lumens per square foot as they absorb more light, while lighter colors reflect more light.