page_title: List of obsolete units of measurement
section_title: Luminosity
hierarchical_section_title: List of obsolete units of measurement / Luminosity
caption_attribution_description: Hefnerlampe (Holzstich)
context_page_description: This is a list of obsolete units of measurement, sorted by type. These units of measurement are typically no longer used, though some may be in limited use in various regions.
context_section_description: Candlepower – an obsolete unit expressing luminous intensity equal to 0.981 candela, it expresses levels of light intensity in terms of the light emitted by a candle of specific size and constituents. In modern usage candlepower equates directly to the unit known as the candela.
  Carcel burner – an efficient lighting device used in the nineteenth century for domestic purposes and in France as the standard measure for illumination
  Carcel
  Hefner candle
  Violle
caption: A Hefner lamp (German: Hefnerkerze)
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