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Lighting Levels

The Illuminating Engineering Society (lES) recommends a range of footcandle levels to ensure adequate illumination and safety for occupants.

A footcandle is defined as the illumininance on one square foot surface from a uniform light source. Below is a guideline for common modular builduing applications to assist in achieving appropriate light levels with the greatest energy‐efficiency. The required light levels are indicated in a range because different tasks require different amounts of light. In general, low contrast and detailed taks require more light while high contrast and less detailed tasks require less light.

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Building Area / Task

  • Assembly ‐ Large Items
  • Assembly ‐ Small Items
  • Breakroom
  • Cafeteria
  • Classroom
  • CMM Room
  • Component Mfg. ‐ Large
  • Component Mfg. ‐ Medium
  • Conference Room
  • Corridor
  • Laboratory
  • Lobby
  • Locker Room
  • Office ‐ Private or Open
  • Storage Room
  •  

    Footcandle Range

  • 15 ‐ 60
  • 50 ‐ 200
  • 5 ‐ 20
  • 20 ‐ 30
  • 30 ‐ 50
  • 50 ‐ 100
  • 15 ‐ 60
  • 25 ‐ 100
  • 30 ‐ 50
  • 10 ‐ 40
  • 75 ‐ 120
  • 20 ‐ 30
  • 10 ‐ 30
  • 30 ‐70
  • 5 ‐ 20
  •  


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