The following table show twilight at key west fla. may 30 and ,may 31
[FONT=Arial, Helvetica]Twi A: 5:11am[/FONT]
[FONT=Arial, Helvetica]Twi N: 5:43am[/FONT]
[FONT=Arial, Helvetica]Twi: 6:13am[/FONT]
[FONT=Arial, Helvetica]Sunrise: 6:38am[/FONT]
[FONT=Arial, Helvetica]Sunset: 8:10pm[/FONT]
[FONT=Arial, Helvetica]Twi: 8:36pm[/FONT]
[FONT=Arial, Helvetica]Twi N: 9:06pm[/FONT]
[FONT=Arial, Helvetica]Twi A: 9:37pm[/FONT]
[FONT=Arial, Helvetica]Moonrise: 1:00pm[/FONT]
[FONT=Arial, Helvetica]Moonset: 1:09am[/FONT]
[FONT=Arial, Helvetica]First Qtr: 10:23pm[/FONT]
31
[FONT=Arial, Helvetica]Twi A: 5:11am[/FONT]
[FONT=Arial, Helvetica]Twi N: 5:42am[/FONT]
[FONT=Arial, Helvetica]Twi: 6:13am[/FONT]
[FONT=Arial, Helvetica]Sunrise: 6:38am[/FONT]
[FONT=Arial, Helvetica]Sunset: 8:11pm[/FONT]
[FONT=Arial, Helvetica]Twi: 8:36pm[/FONT]
[FONT=Arial, Helvetica]Twi N: 9:06pm[/FONT]
[FONT=Arial, Helvetica]Twi A: 9:38pm[/FONT]
[FONT=Arial, Helvetica]Moonrise: 1:59pm[/FONT]
[FONT=Arial, Helvetica]Moonset: 1:45am[/FONT]
Plenty of time for the eyes to adapt. C, N, A, refer to civil twilight, nautical twilight,(when you can get good celestial fixes,) and astronomical twilight when you can see the lowest magnitude stars.