A proposed unified system of photometry

@article{Rea2004APU,
  title={A proposed unified system of photometry},
  author={Mark S. Rea and JD Bullough and JP Freyssinier-Nova and Andrew Bierman},
  journal={Lighting Research \& Technology},
  year={2004},
  volume={36},
  pages={109 - 85}
}
,!A unified system of photometry is proposed that is based on human vision and allows the specification of visual stimuli at all light levels. To be useful, however, photometry can never be entirely synonymous with vision. Additivity is an essential characteristic of photometry, yet many visual responses, such as brightness matching, incorporate visual channels that are inherently non-additive in responding to light. Following a review of models of mesopic photometry based on a number of… 

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