IEC 60050 - International Electrotechnical Vocabulary


IEVref:	845-21-064	ID:
Language:	en	Status: Standard

Term:	semi-cylindrical illuminance
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Symbol:	E_v,sc E_sc
Definition:	arithmetic mean of the vertical illuminances, E_v,v, at a point in the range of azimuth angles $- \frac{π}{2} \leq φ \leq \frac{π}{2}$ $E_{v,sc} = \frac{1}{π} \int_{- \frac{π}{2}}^{\frac{π}{2}} E_{v,v} d φ$ Note 1 to entry: The semi-cylindrical illuminance is expressed in lux (lx = lm·m⁻²).
Publication date:	2020-12
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