<P> At latitudes higher than about 60 ° 34, summer nights get no darker than civil twilight . This period of "bright nights" is longer at higher latitudes . </P> <Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2013) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2013) (Learn how and when to remove this template message) </Td> </Tr> <P> Around the summer solstice, Glasgow, Scotland at 55 ° 51 ′ N, and Copenhagen, Denmark at 55 ° 40 ′ N, get a few hours of "night feeling". Oslo, Norway at 59 ° 56 ′ N, and Stockholm, Sweden at 59 ° 19 ′ N, seem very bright when the Sun is below the horizon . When the sun gets 9.0 to 9.5 degrees below the horizon (at summer solstice this is at latitudes 57 ° 30 ′--57 ° 00 ′), the zenith gets dark even on cloud - free nights (if there is no full moon), and even the brightest stars are clearly visible in a large majority of the sky . </P>

Dim light at the beginning and end of daylight