apparent candlepower

noun

Definition of apparent candlepower

:the candlepower of an extended source of light that is equal to the candlepower of a point source of light which if located at the extended source would produce an equivalent illumination at the distance specified
  • The inverse square law is not correct at short distances. This does not affect the calculations for efficiency or utilization. In fact, the apparent candlepower reported for a ten-foot test distance is more realistic for actual installations than that measured at 40 feet.
  • Illuminating Engineering1962

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