Editing Cosmic ray visual phenomena (section)

==Conditions under which the light flashes were reported==
Astronauts who had recently returned from space missions to the [[Hubble Space Telescope]], the [[International Space Station]] and [[Mir Space Station]] reported seeing the LF under different conditions. In order of decreasing frequency of reporting in a survey, they saw the LF in the dark, in dim light, in bright light and one reported that he saw them regardless of light level and light adaptation.<ref name="Fuglesand2006">{{cite journal |url=http://www.ingentaconnect.com/content/asma/asem/2006/00000077/00000004/art00012 |title=Phosphenes in Low Earth Orbit: Survey Responses from 59 Astronauts |journal=Aviation, Space, and Environmental Medicine |first1=Christer |last1=Fuglesang |first2=Livio |last2=Narici |first3=Piergiorgio |last3=Picozza |first4=Walter G. |last4=Sannita |volume=77 |issue=4 |pages=449–452 |date=April 2006 |pmid=16676658}}</ref> They were seen mainly before sleeping.