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How many lumens are required at stairs in a home?
Saturday, February 29, 2020
The International Residential Code (IRC R303.7) specifies one footcandle of light as measured at the center of treads and landings as a minimum for interior stairs. One footcandle (fc) equals one lumen per square foot (lm/sq²). The code requires exterior stairs to have an artificial light source located at the top landing of the stairway, but does not specify a minimum light level. For full details, see our blog post What is the lighting requirement for stairs?
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