It would be interesting to see if you can tell the difference between these, with a higher resistance load. In the beginning of morning astronomical twilight and at the end of astronomical twilight in the evening, sky illumination is very faint, and might be undetectable.
The sun does not contribute to the illumination of the sky before this time in the morning, or after this time in the evening. The time period when the sun is between 12 and 18 degrees below the horizon at either sunrise or sunset. Ordinary outdoor activities are not possible at this time without extra illumination. The horizon is well defined and the outline of objects might be visible without artificial light. The time period when the sun is between 6 and 12 degrees below the horizon at either sunrise or sunset. One still should be able to carry on ordinary outdoor activities. The horizon should be clearly defined and the brightest stars should be visible under good atmospheric conditions (i.e.
The time period when the sun is no more than 6 degrees below the horizon at either sunrise or sunset. Nautical Twilight 5:35 AM EST 5:31 PM ESTĪstronomical Twilight 5:01 AM EST 6:05 PM EST Mine today are like this: Civil Twilight 6:10 AM EST 4:56 PM EST
There are 3 different definitions of dusk/dark.
Might be interesting to find the statistics for your location/date.
