Editing Polar night (section)

====Civil polar twilight====
Civil polar twilight occurs at latitudes above 72°34' North or South, where the Sun will be below the horizon all day on the [[winter solstice]], but by less than 6° at [[solar noon]].<ref>{{cite web |url=https://basecampexplorer.com/spitsbergen/arctic-dictionary/polar-night/   |title=Polar Night|author=<!--Not stated--> |date= |website=Base Camp Explorer |publisher= |access-date=February 6, 2025}}</ref> There is then no true [[daylight]] at the [[solar culmination]], only [[civil twilight]]. During civil polar twilight, there is still enough light for most normal outdoor activities at midday because of light scattering by the upper atmosphere and refraction. However, during dense cloud cover, places like the coast of [[Finnmark]] (about&nbsp;70°) in [[Norway]] will experience a "day" that is darker than usual. [[Street lamp]]s may therefore remain on even at midday, and a person looking at a window from within a brightly lit room might still be able to see their reflection, as the level of outdoor [[illuminance]] will be below that of many illuminated indoor spaces. 

Northern Hemisphere:

*68° North: about December 9 to January 2
*69° North: about December 1 to January 10
*70° North: about November 26 to January 16
*71° North: about November 21 to January 21
*72° North: about November 16 to January 25

Southern Hemisphere:

*68° South: about June 7 to July 3
*69° South: about May 30 to July 11
*70° South: about May 24 to July 18
*71° South: about May 19 to July 23
*72° South: about May 14 to July 27

Sufferers of [[seasonal affective disorder]] tend to seek out therapy with artificial light, as the psychological benefits of daylight require relatively high levels of ambient light (up to 10,000&nbsp;[[lux]]) which are not present in any stage of twilight; thus, the midday twilights experienced anywhere inside the polar circles are still "polar nights" for this purpose.