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LED Recessed Lighting Formula:
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The LED recessed lighting calculation determines how many LED lights are needed to achieve the desired illumination level in a space based on the total required lumens and the output of individual LED lights.
The calculator uses the simple formula:
Where:
Explanation: This calculation helps determine the quantity of LED recessed lights needed to achieve proper illumination in a room or space.
Details: Proper lighting calculation ensures adequate illumination for the intended use of the space while avoiding over-lighting (which wastes energy) or under-lighting (which creates poor visibility).
Tips: Enter the total lumens required for your space and the lumens output per LED light. Both values must be positive numbers.
Q1: How do I determine total lumens needed for a space?
A: Total lumens depend on room size and purpose. General lighting needs range from 20-30 lumens per square foot for living spaces to 70-80 for task lighting.
Q2: What's a typical lumen output for recessed LED lights?
A: Common residential LED recessed lights range from 600-1200 lumens each, while commercial fixtures may be higher.
Q3: Should I account for light loss factors?
A: For precise calculations, consider multiplying total lumens by 1.25 to account for light loss due to factors like fixture efficiency and room reflectance.
Q4: How does spacing affect the number of lights?
A: While this calculator gives the total number, proper spacing depends on ceiling height and beam angle. A lighting designer can help with layout.
Q5: Can I mix different lumen output lights?
A: Yes, but the calculation becomes more complex. It's generally easier to use fixtures with consistent output for even illumination.