“FYI: NCARB made an error on the second electrical formula on the reference sheet forBS ARE exam.
The bottom formula on thereference sheet will make sense if the (lumens) is changed to (lumens per fixture), which = (lumens per lamp) x (number of lamps per fixture).
You need to know that luminaires means fixtures.
So the second electricalformula on the reference sheet should correctly read:
Number of luminaires = (footcandles) x (floor area) /(lumens per fixture) x (CU) x (LLF), where CU = coefficient of utilization and LLF = Light Lost Factor”
Quoted from page 24 of"Building Systems (BS) ARE Mock Exam (Architect Registration Exam)"
Copyright 2011 Gang Chen, Author, AIA, LEED AP BD+C. Non-exclusive and nontransferable right of use granted.
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