July 04, 2014, 07:07:52 am
Night Activation settings are part of the Light Properties, so use the Edit Properties (Pencil tool) to open the Dialogue, see attached pic.
This only applies to Spotlights, not Fill or Omni Lights.
If you do a multiple selection of lights first, then you can change a group all at once.
There is no time of day setting that you can specify. The lights go on/off based on the time of day as set by the Sun Effect or Sun Study Effect. In this way it's quick and automatic to get the results.