The event will trigger at either Sunrise or Sunset. You must tell HomeSeer where you live by entering your longitude and latitude under the menu View->Options->Sunrise/Sunset. Here you can either pick a city close to you or enter your exact longitude and latitude. HomeSeer automatically adjusts the Sunrise/Sunset times at midnight every night.
The trigger dialog will display the current Sunrise and Sunset times. Note that daylight savings is handled by your computer. Make sure your computer is set to handle daylight savings or your sunrise and sunset times will be incorrect. This is usually set by double clicking the clock in your Windows system tray.
Sunrise/Sunset offset
If you wish the event to be triggered at a specific offset from the actual
sunrise or sunset time, you can enter it here. For example, if it is still
somewhat light outside when actual sunset occurs, you may want to delay
turning on your outside lights for 30 minutes. Set the event to trigger
to 30 minutes after sunset.
You can set the offset up to 12 hours before or 12 hours after sunrise/sunset.
Figure 13 Trigger by Sunrise/Sunset