Daylight efficiency of artificial illuminants
Book details
- Title
- Daylight efficiency of artificial illuminants
- Publication year listed
- 1909
- Format
- Public domain eBook
- Reading access
- Free online reader; no registration required
- Source record
- View on Archive.org
About this book
Daylight efficiency of artificial illuminants
Year: 1909
The author suggests that there is a need for some method of estimating the resemblance of artificial illuminants to daylight, /b i.e./, of determining their "daylight efficiency." Assuming that, by the extraction of certain qualities of light in an illuminant its colour could be brought to resemble that of daylight very closely, the daylight efficiency of a source might be expressed in the form (intensity of available white light)/(total intensity of source). The author suggests two methods of studying this question. The first is based upon the use of suitable absorbing screens which, as explained above, could be used to bring the colour of an illuminant into near agreement with daylight, though reducing its intensity in doing so. The author presents some spectrophot