Orders of magnitude (luminance)

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This page lists examples of luminances, measured in candelas per square metre and grouped by order of magnitude.

Multiple Value Item
10−6 µcd/m2 1 µcd/m2 absolute threshold of vision[1]
10−4 400 µcd/m2 darkest sky[2]
10−3 mcd/m2 1 mcd/m2 night sky[3]
1.4 mcd/m2 typical photographic scene lit by full moon[4]
5 mcd/m2 approximate scotopic/mesopic threshold[5]
10−2 40 mcd/m2 phosphorescent markings on a watch dial after 1 h in the dark[6][7]
100 cd/m2 2 cd/m2 floodlit buildings, monuments, and fountains[8]
5 cd/m2 approximate mesopic/photopic threshold[5]
101 25 cd/m2 typical photographic scene at sunrise or sunset[4]
30 cd/m2 green electroluminescent source[2]
55 cd/m2 standard SMPTE cinema screen luminance[9]
80 cd/m2 monitor white in the sRGB reference viewing environment
102 250 cd/m2 peak luminance of a typical LCD monitor[10][11]
700 cd/m2 typical photographic scene on overcast day[8][4][11]
103 kcd/m2 2 kcd/m2 average cloudy sky[2]
2.5 kcd/m2 moon surface[2][3]
5 kcd/m2 typical photographic scene in full sunlight[8][4]
7 kcd/m2 average clear sky[3][2][1][11]
104 10 kcd/m2 white illuminated cloud[3]
12 kcd/m2 fluorescent lamp[2][3]
75 kcd/m2 low pressure sodium-vapor lamp[3]
105 130 kcd/m2 frosted incandescent light bulb[2][3][11]
600 kcd/m2 solar disk at horizon[2]
106 Mcd/m2 7 Mcd/m2 filament of a clear incandescent lamp[12]
108 100 Mcd/m2 possible retinal damage[1]
109 Gcd/m2 1.6 Gcd/m2 solar disk at noon[2][3]

See also[edit]

Notes and references[edit]

  1. ^ a b c Hahn, Lance (1996). "Photometric Units". University of Pennsylvania Medical Center, Department of Neuroscience. Retina Reference. Robert G. Smith. Retrieved 2013-10-10.  (see http://retina.anatomy.upenn.edu/~rob/lance/articles.html for the references within)
  2. ^ a b c d e f g h i Mischler, Georg. "Lighting Design Glossary – Luminance". schorsch.com. Retrieved 2013-10-10. 
  3. ^ a b c d e f g h "Lighting Application". NVC Lighting Technology Corporation. Retrieved 2013-10-10. 
  4. ^ a b c d based on Orders of magnitude (illuminance), assuming a typical photographic scene has the same reflectance as a 18% gray card
  5. ^ a b Halonen, Liisa; Bizjak, Grega. "CIE Mesopic photometry – implementation for outdoor lighting". University of Ljubljana, Faculty of Electrical Engineering, laboratory of Lighting and Photometry. Retrieved 2013-10-10. 
  6. ^ "Luminosity in Watches". 2011-09-29. first decay graph of section 3.4 – The Afterglow. Retrieved 2013-10-11. 
  7. ^ "Characteristic and comparison between LumiNova G Series and conventional pigment". Nemoto Lumi-Materials. 2011-11-09. afterglow graph on p. 1. Retrieved 2013-10-11. 
  8. ^ a b c based on this table of exposure values, assuming a reflected-light meter calibration constant of 12.5 cd·s/m2
  9. ^ "Screen Luminance Data Sheet". Harkness Screens International. Retrieved 2013-10-10. 
  10. ^ "Brightness and Contrast Ratio". Screen Tek. Retrieved 2013-10-10. 
  11. ^ a b c d when sources quote wide ranges of possible values, a (rounded) geometric mean of those values is reported here
  12. ^ "Basics of light and lighting". Philips Lighting Academy. 2008. p. 29. Retrieved 2013-10-18.